Answer:
The correct interpretation of the 95% confidence interval is that there is 95% confidence that the true proportion of people who own a tablet computer is within the upper limit (0.78) and the lower limit (0.62) of the confidence interval
Step-by-step explanation:
From the question we are told that
The 95% confidence interval is (0.62,0.78)
Generally the correct interpretation of the 95% confidence interval is that there is 95% confidence that the true proportion of people who own a tablet computer is within the upper limit (0.78) and the lower limit (0.62) of the confidence interval
A market sells 7 oranges for2.45 how muck will 8 oranges cost
Answer:
17.15
step by step explanation
2.45 divided by seven equals .35.
So each oranges is .35¢
So now multiply .35 by 8 and you’ll get a total of $2.80
$2.80 for 8 oranges.
What is the probability that from a sample of 100 Indianapolis residents, fewer than 95% were rooting for the Giants in Super Bowl XLVI
Complete Question
Super Bowl XLVI was played between the New York Giants and the New England Patriots in Indianapolis. Due to a decade-long rivalry between the Patriots and the city’s own team, the Colts, most Indianapolis residents were rooting heartily for the Giants. Suppose that 90% of Indianapolis residents wanted the Giants to beat the Patriots. What is the probability that from a sample of 100 Indianapolis residents, fewer than 95% were rooting for the Giants in Super Bowl XLVI?
Answer:
The value is [tex]P(X < 0.95) = 0.95224[/tex]
Step-by-step explanation:
From the question we are told that
The proportion that wants Giants to win p = 0.90
The sample size is n = 100
Generally the mean of this sampling distribution is
[tex]\mu_{x} = 0.90[/tex]
Generally the standard deviation is
[tex]\sigma = \sqrt{\frac{p(1- p)}{n} }[/tex]
=> [tex]\sigma = \sqrt{\frac{ 0.90 (1- 0.90)}{100} }[/tex]
=> [tex]\sigma = 0.03[/tex]
Generally the probability that from a sample of 100 Indianapolis residents, fewer than 95% were rooting for the Giants in Super Bowl XLVI is mathematically represented as
[tex]P(X < 0.95) = P(\frac{ X - \mu_{x}}{\sigma} < \frac{0.95 -0.90}{0.03} )[/tex]
[tex] \frac{X -\mu}{\sigma } = Z (The \ standardized \ value\ of \ X )[/tex]
[tex]P(X < 0.95) = P(Z < 1.667 )[/tex]
=> [tex]P(X < 0.95) = 0.95224[/tex]
Ben bought a 2 pizza for $20.40, and a brownie for $5.40, and a chocolate milkshake for $6.50 with extra chocolate, he also payed $10 for tips. He had $60 to spend, how much did he have balance?
Answer:
$17.70
Step-by-step explanation:
Total money he has - $60
2 pizzas, a brownie = $20.40 + $5.40 = $25.80
A milkshake with $10 tips = $6.50 + $10 = $16.50
Totally = $25.80 + $16.50 = $42.30
Balance - $60 - $42.30 = $17.70
He had $17.70 balance
Hope you understand
:-)
A nursery has two hundred 7-gallon palm trees to sell, consisting of Coconut Palm trees, x, Saw Palmetto Palm trees, y, and Christmas Palm trees, z. Coconut Palm trees
sell for $75 each, Saw Palmetto Palm trees sell for $45 each, and Christmas Palm trees sell for $30 each. A developer purchases all of the nursery's palm trees for a total
price of $12,300. The nursery has three times as many Saw Palmetto Palm trees as Christmas Palm trees. Write a system of linear equations to represent this situation.
A 2+y+z=7
75x + 45y + 30z = 12,300
y = 32
B. x+y+z= 12,300
75x + 45y + 30z = 200
y = 32
C. 2 + y + z = 200
752 + 45y + 30z = 12,300
y = 32
D. 2+y+z= 200
753 + 45y + 30z = 12,300
z=3y
is it a, b,c or d
Answer:
The answer is option D. Note: the option is not properly formatted
D. x+y+z=200----------------1
75x+45y+30z=12300-------2
z=3y---------------3
Step-by-step explanation:
In this problem, we want to model the expression to represent the situation
let the numbers of trees be
Coconut Palm trees be x,
Saw Palmetto Palm trees be y, and
Christmas Palm trees be z.
total trees =200
x+y+z=200----------------1
also costs are
Coconut Palm trees= $75 each
Saw Palmetto Palm trees = $45 each
Christmas Palm trees =$30 each
cost of all trees =$12,300
75x+45y+30z=12300----------------------2
z=3y---------------3
The system of equation is
x+y+z=200----------------1
75x+45y+30z=12300-------2
z=3y---------------3
pls ignore my answer in the text box
Answer:
IS IT FREE??????????????????/
The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 270 minutes and a standard deviation of 50 minutes. a) What is the probability that a battery lasts more than four hours
Answer:
The answer is below
Step-by-step explanation:
The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 270 minutes and a standard deviation of 50 minutes. a) What is the probability that a battery lasts more than four hours b) What are the quartiles (the 25% and 75% values) of batterylife? c) c) What value of life in minutes is exceeded with 95% probability? (Roundthe answer to the nearest integer.)
Solution:
The z score is used to determine by how many standard deviations the mean is above or below the raw score. If the z score is positive then the raw score is above the mean while if the z score is negative then the raw score is below the mean. The z score is given by:
[tex]z=\frac{x-\mu}{\sigma}\\ \\\mu=mean, \sigma=standard\ deviation[/tex]
Given μ = 270 minutes, σ = 50 minutes
a)
P(x > 4 hours) = P(x > 240 minutes)
[tex]z=\frac{x-\mu}{\sigma}\\ \\z=\frac{240-270}{50} =-0.6[/tex]
From the distribution table, P(x > 240) = P(z > -0.6) = 1- P(z < 0.6) = 1 - 0.2743 = 0.7257
c) P(z > z*) = 0.95
1 - P(z < z*) = 0.95
P(z < z*) = 0.05
This corresponds to a z score of -1.645
[tex]z=\frac{x-\mu}{\sigma}\\ \\-1.645=\frac{x-270}{50} \\\\x=187.75 \ minutes[/tex]
For 75%, P(z < z*) = 0.75
This corresponds to a z score of 0.68
[tex]z=\frac{x-\mu}{\sigma}\\ \\0.68=\frac{x-270}{50} \\\\x=304 \ minutes[/tex]
c) For 25%, P(z < z*) = 0.25
This corresponds to a z score of -0.67
[tex]z=\frac{x-\mu}{\sigma}\\ \\-0.67=\frac{x-270}{50} \\\\x=236.5 \ minutes[/tex]
Round 683,492 to the nearest hundred thousand,
A. 600,000
B. 683,000
C. 680,000
D. 700,000
Plz hurry
Answer:
since you're rounding to the hundred thousand, it would round up to the 4th option as 683,492 is closer to 700,000 than 600,000
(39)
2 + 3 = 4
(y + 4) (
(
2 + 5 + 4
( + 1) (
(y + 4)()
= ()
( + 1)()
= ()()
Answer:
2&u4hds
Step-by-step explanation:
ok
LaWanda was born in 2001 and plans to retire at age 64. According to her most recent Social Security statement, her full benefit will be $2,100 per month. What is her monthly benefit if she begins claiming Social Security at age 64?
A)$1,430
B)$1,640
C)$1,560
D)$1,680
Answer:
It might be A
Step-by-step explanation:
but that's what I think
Convert the following to the nearest tenth. (You may use a calculator.)
105 kilometers to miles
miles = ?
Answer:
65.24 miles.
Step-by-step explanation:
Pleaseeeee help ASAP will give BRAINLEIST!!
find the point of intersection of the lines represented by the equation 3x²-5xy-2y²-x+9y-4=0.
Answer:
Point of Interesection: (1, 1)
Step-by-step explanation:
Given the equation 3x^2-5xy-2y^2-x+9y-4 = 0.
We can translate this into a system of equations: y = 1/2x + 1/2, and y = -3x + 4.
Help????
I have to turn this innn
Answer:
The answer is -12
Step-by-step explanation:
Because if X=3 and it was -X4 times then it is 3x4 which equals 12 then add the negative back to the answer you get -12
Answer:
The answer is -81
Step-by-step explanation:
..........
418.42 plus 13.587 i do not know the answer and I am not very good at math because of family problems. thats not the point but i need help.
Answer:
432.007Step-by-step explanation:
418 + 13 = 431
0.42 + 0.587 = 1.007
431
+ 1.007
432.007
Hope this helps! <3
Bob throws a fair four-sided die, after which Alice throws a fair and independent six-sided die. What is the probability that they obtain the same number?
Answer: 1/6.
Step-by-step explanation:
The possible outcomes of Bob are {1, 2, 3, 4}
The possible outcomes of Alice are {1, 2, 3, 4, 5, 6}
Notice that the outcome space of Bob is included in the outcome space of Alice.
Now, Bob rolls his dice and gets an outcome between 1 and 4, let's suppose that the outcome is a 2.
Now, Alice needs to roll a 2 in her 6-sided dice.
The 2 appears one time, and there are 6 possible outcomes:
The probability will be equal to the probability for each number, this i:
P = 1/6.
And will be the same for any outcome in Bob's roll, so the probability that they obtain the same number is 1/6.
What will happen to the mean if the median will increase?
Answer:
It will increase
Step-by-step explanation:
As the mean increases the median also increases.
Find the volume of the region bounded by z=12−y,z=y,y=x2, and y=6−x2. (Use symbolic notation and fractions where needed.)
Answer:
The volume V of the region = 80
Step-by-step explanation:
The objective is to find the volume of the solid region bounded by z = 12 - y
Given that the portion of solid between the planes z = 12 - y and z = y; over the region R in the xy - plane bounded by y = x² and y = 6 - x²
Thus; R = { (x,y)/-2 ≤ x ≤ 2, x² ≤ y 6 - x² }
Then the volume is computed as follows:
[tex]V = \int \int_R [(12 -y) -y] \ dy. dx[/tex]
[tex]V = \int^2_{-2} \int ^{6-x^2}_{x^2} (12-2y) \ dy \ dx[/tex]
[tex]V = \int^2_{-2}[ (12y-y^2]^{6-x^2}_{x^2} \ dx[/tex]
[tex]V = \int^2_{-2} \begin {bmatrix}{ 12 [6-x^2-x^2] - [(6-x^2)^2-(x^2)^2] \end {bmatrix} \ dx[/tex]
[tex]V = \int^2_{-2} \begin {bmatrix}{ 12 [6-2x^2] - [36-12x^2]] \end {bmatrix} \ dx[/tex]
[tex]V = \int^2_{-2} \begin {bmatrix}{ 72 -24x^2-36+12x^2 \end {bmatrix} \ dx[/tex]
[tex]V = \int^2_{-2} [36-12x ^2] \ dx[/tex]
[tex]V = \begin {bmatrix} 36x - \dfrac{12x^3}{3}\end {bmatrix}^2_{-2}[/tex]
[tex]V =2 \begin {bmatrix} 72 - \dfrac{96}{3}\end {bmatrix}[/tex]
V = 80
Please help I would appreciate it
Newly purchased automobile tires of a certain type are supposed to be filled to a pressure of 30 psi. Let μ denote the true average pressure. Find the P-value associated with each of the following given z statistic values for testing H0: μ = 30 versus Ha: μ 30 when σ is known. (Give the answers to four decimal places.)
Complete Question
Newly purchased automobile tires of a certain type are supposed to be filled to a pressure of 30 psi. Let μ denote the true average pressure. Find the P-value associated with each of the following given z statistic values for testing H0: μ = 30 versus Ha: μ 30 when σ is known. (Give the answers to four decimal places.)
calculate for each
(a) z = 2.30
(b) z = -1.7
Answer:
a
[tex]p-value = 0.021448[/tex]
b
[tex]p-value = 0.08913[/tex]
Step-by-step explanation:
From the question we are told that
The population mean is [tex]\mu = 30 \ psi[/tex]
The null hypothesis [tex]H_o : \mu = 30[/tex]
The alternative hypothesis is [tex]H_a : \mu \ne 30[/tex]
Considering question a
Here the test statistics is (a) z = 2.30
From the z table the probability of (Z > 2.30) is
[tex]P(Z > 2.30 ) = 0.010724[/tex]
Generally the p-value is mathematically represented as
[tex]p-value = 2 * P(Z > 2.30 )[/tex]
=> [tex]p-value = 2 * 0.010724[/tex]
=> [tex]p-value = 0.021448[/tex]
Considering question b
Here the test statistics is (a) z = -1.7
From the z table the probability of (Z < -1.7) is
[tex]P(Z < -1.7 ) = 0.044565[/tex]
Generally the p-value is mathematically represented as
[tex]p-value = 2 * P(Z < -1.70 )[/tex]
=> [tex]p-value = 2 * 0.044565[/tex]
=> [tex]p-value = 0.08913[/tex]
What is the equation of the vertical line through
(
−
8
,
5
)
(−8,5)left parenthesis, minus, 8, comma, 5, right parenthesis?
Answer:
y= 13/4x - 21
Step-by-step explanation:
What we need to do is find the slope first. We know the slope formula is
y_1 minus y_2/ x_1 minus x_2. I am assuming that one point is (8,5) the other is (4,-8). So when we insert these coordinates into the equation,
[5-(-8)/8-4] we result with 13/4 as the slope. We can now use the slope-intercept form! ( y=mx+b) 13/4 can be put into this equation as m, because its the slope. So, now we have y=13/4x+b. The last step to find the equation is inserting the first coordinates given.(8,5) 5= 8(13/4)+b. 8 times 13 divided by 4 is 26. This is what we factored to so far: 5= 26+b. We are trying to solve for b! So lastly, 5-26= -21 and that is b. Once again, we can use the slope intercept formula since we know both b and the slope. FINAL ANSWER: y=13/4x-21. I hope this can help!
Answer:
-8
Step-by-step explanation:
The value of one score in a distribution is changed from X = 20 to X = 30. Which measure(s) of central tendency is (are) certain to change?
Answer:
Mean
Step-by-step explanation:
The three basic measures of central tendencies are mean, median and mode.
Mean can be described as the average value of a set of numbers or scores in a distribution.
One of the ways the mean can be calculated is by dividing the sum of the scores in a distribution by the number of scores in the distribution. This can be represented mathematically as follows:
Mean = Sum of the scores in a distribution / Number of scores in the distribution ........ (1)
Median is the middle number when the scores in a distribution is arranged in ascending or descending order.
Mode is the most frequent number or score in a distribution.
Out of the three basic measures of central tendencies only the mean will certainly change when there is a change in one of the scores. This is because, we can still have the same score as the most frequent and the same number as the median but the mean will change.
For example, we can prove that the mean will certainly change if we assume that the sum of the scores in a distribution is 200 and number of scores in the distribution is 10, wee can substitute this into equation (1) and have:
Mean = 200 / 10 = 20
Now, as given in the question, if the value of one score in the distribution is changed from X = 20 to X = 30. We can obtain the difference as follows:
Difference in score = 30 - 20 = 10
The new mean can be calculated as follows:
New mean = (200 + Diffrence in score) / 20 = (200 + 10) / 20 = 210 / 20 = 21
Therefore, the mean changed by 1 from 20 to 21. This therefore proves that the mean will certainly change.
Of the measures of central tendency, the measure which will certainly change is the mean.
Measures of central tendency include mean, median and mode of a distribution.
The mean refers to the average, hence, the a change in one value in the distribution would certainly change the mean of the distribution.
The mode refers to the highest occurring value in the distribution.
Median denotes the number at the middle of a distribution once it is arranged in order of magnitude.
For instance :
2, 2, 10, 15, 20The mean = (2 + 2 + 10 + 15 + 20) / 5 = 49/5 = 9.8
Mode = 2 (highest occuring)
Median = 10 (middle value)
If X = 20 is changed to X = 30
2, 2, 10, 15, 30The mean = (2 + 2 + 10 + 15 + 30) = 59/5 = 11.8
Mode = 2 (highest occuring)
Median = 10 (middle value)
Therefore, the measure which would certainly change is the mean.
Learn more : https://brainly.com/question/8882508
What is the value of x in the equation 3x - y = 18, when y = 27? 5 7 0 45 63
Answer:
x=15
Step-by-step explanation:
3x-27=18
3x=18+27
3x=45
x=45/3
x=15
Answer:
ITS 7
Step-by-step explanation:
I got the other ones wrong and i checked what was the correct answer and it said it was 7
Heeeeeeeeeellllllllllllppppppppp
Decide if the situation involves permutations, combinations, or neither. Explain your reasoning. The number of ways 13 people can line up in a row for concert tickets. Does the situation involve permutations, combinations, or neither? Choose the correct answer below.
Step-by-step explanation:
The situation involves permutation. Permutation deals with arrangements of objects. It talks about ways peoples or objects can be arranged with or without restriction. According to the question,
The number of ways 13 people can line up in a row for concert tickets can be expressed as
13! = 13 * 12 * 10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1
13! = 6,227,020,800 ways
Hence the number of ways 13 people can line up in a row is 6,227,020,800 different ways and the situation involves permutation.
If 2c + 1 = 11, what is the value of 2c?
4
5
10
12
Answer:
10
Step-by-step explanation:
ur welcome
Answer:
10
Step-by-step explanation:
I just took the quiz soooooo yuh hope this helps
D 2. Choose the correct answer.
Art's wife wants to cover the floor with 1 foot square carpet tiles. The tiles are sold in boxes of 20 for $38.90. Before Art's wife can buy the correct amount of
boxes, what other information does she need to know?
O the color of the tiles
O the dimensions of the floor
O the amount of tax
all of these
6. At 7:00 a.m., the temperature outside was 10°F below zero. By noon, it
rose by 17°F. At 6:00 p.m., the temperature dropped by 6°F. What was the
evening temperature? *
0 -33°F
O 13°F
O 1°F
O 33°F
Answer:
1° F
Step-by-step explanation:
10° below zero is equivalent to -10°.
Then if you add 17° to that, then you get 7°.
Then subtract 6°, giving you a final answer of 1° F
What i te value of x in this equation 4x = 5x - 15?
Answer:
15
Step-by-step explanation:
[tex]4x - 5x = - 15[/tex]
[tex] - x = - 15[/tex]
[tex]x = 15[/tex]
i think this is the answer
Where d you like to go
Answer:
the park
Step-by-step explanation:
Answer:
Your mom's house
Step-by-step explanation:
Jeremy earns $9.75 per hour at his after school job.
Write an equation to find the total number of hours, h,
Jeremy worked if he earned $126.75 last week.
