Answer:
8
Step-by-step explanation:
4*8 gives us 32.
HOLY F THE I JUST ASKED OUT MY CRUSH!!!!
SHE SAID YES!!!
Now wha lol
Answer:
how you gonna go out in a pandemic?
Step-by-step explanation:
unless you're in a place where the virus was handled properly, the understandable, have a nice day.
and uhh
communication is key to a healthy relationship
1 a) A random sample of 25 was drawn from a normal distribution with a standard deviation of 5. The sample mean is 80. Determine the 95% confidence interval estimate of the population mean.b) Repeat part (a) with a sample size of 100.c) Repeat part (a) with a sample size of 400.d) Describe what happens to the confidence interval estimate when the sample size increases.2 a) The mean of a sample of 25 was calculated as ¯x=500. The sample was randomly drawn from a population with a standard deviation of 15. Estimate the population mean with 99% confidence.b) Repeat part (a) changing the population standard deviation to 30.c) Repeat part (a) changing to the population standard deviation to 60.d) Describe what happens to the confidence interval estimate when the standard deviation is increased.
Answer:
1a)Confidence Interval: (77.936,82.064)
b)Confidence Interval: (79.020, 80.980)
c)Confidence Interval: (79.510, 80.490)
d) As the sample size increases, the confidence interval for the lower class (bound) increases while that of the upper class(bound) decreases.
2a)Confidence Interval: (491.609
, 502.797)
b)Confidence Interval: (483.218, 516.782)
c)Confidence Interval: (466.436,533.564)
d)As the standard deviation increases, the confidence interval for the lower class (bound) decreases while that of the upper class(bound) increases.
Step-by-step explanation:
1 a) A random sample of 25 was drawn from a normal distribution with a standard deviation of 5. The sample mean is 80.
The formula for confidence Interval is:
C.I = Mean ± z score × Standard deviation/√n
Note to apply the formula above n greater than or equal to 30
a) Determine the 95% confidence interval estimate of the population mean.
For a, the confidence interval formula above cannot be applied because n is less than 30, so we use the t score confidence interval value
C.I = Mean ± t score × Standard deviation/√n
Mean = 80
Standard deviation = 5
n = 25
Degree of freedom = 25 - 1 = 24
Hence, 95% confidence interval degree of freedom t score = 2.064
Hence, Confidence Interval =
80 ± 2.064 × 5/√25
80 ± 2.064 × 1
80 ± 2.064
Confidence Interval =
80 - 2.064
= 77.936
80 + 2.064
= 82.064
Confidence Interval: (77.936, 82.064)
b) Repeat part (a) with a sample size of 100.
C.I = Mean ± z score × Standard deviation/√n
Mean = 80
Standard deviation = 5
n = 100
z score for 95% confidence interval = 1.96
C.I = 80 ± 1.96 × 5/√100
C.I = 80 ± 1.96 × 5/10
C.I = 80 ± 1.96 × 0.5
C.I = 80 ± 0.980
Confidence Interval =
80 - 0.980
= 79.020
80 + 0.980
= 80.980
Confidence Interval: (79.020, 80.980)
c) Repeat part (a) with a sample size of 400.
C.I = Mean ± z score × Standard deviation/√n
Mean = 80
Standard deviation = 5
n = 400
z score for 95% confidence interval = 1.96
C.I = 80 ± 1.96 × 5/√400
C.I = 80 ± 1.96 × 5/20
C.I = 80 ± 1.96 × 0.25
C.I = 80 ± 0.490
Confidence Interval =
80 - 0.490
= 79.510
80 + 0.490
= 80.490
Confidence Interval: (79.510, 80.490)
d) As the sample size increases, the confidence interval for the lower class (bound) increases while that of the upper class(bound) decreases.
2a) The mean of a sample of 25 was calculated as ¯x=500. The sample was randomly drawn from a population with a standard deviation of 15.
For a,b and c the confidence interval formula above cannot be applied because n is less than 30, so we use the t score confidence interval value
C.I = Mean ± t score × Standard deviation/√n
a) Mean = 500
Standard deviation = 15
n = 25
Degree of freedom = 25 - 1 = 24
Hence, 99% confidence interval degree of freedom t score = 2.064
Hence, Confidence Interval =
500 ± 2.797 × 15/√25
500 ± 2.797 × 15/5
500 ± 2.797 × 3
Confidence Interval =
500 - 8.391
= 491.609
500 + 8.391
= 508.391
Confidence Interval: (491.609, 508.391)
b) Repeat part (a) changing the population standard deviation to 30
Hence, Confidence Interval =
500 ± 2.797 × 30/√25
500 ± 2.797 × 30/5
500 ± 2.797 × 6
500 ± 16.782
Confidence Interval =
500 - 16.782
= 483.218
500 + 16.782
= 516.782
Confidence Interval: (483.218, 516.782)
c) Repeat part(a) changing to the population standard deviation to 60.
Hence, Confidence Interval =
500 ± 2.797 × 60/√25
500 ± 2.797 × 60/5
500 ± 2.797 × 12
500 ± 33.564
Confidence Interval =
500 - 33.564
= 466.436
500 + 33.564
= 533.564
Confidence Interval: (466.436,533.564)
d)As the standard deviation increases, the confidence interval for the lower class (bound) decreases while that of the upper class(bound) increases.
Twice more than the product of a number and 8 is equal to 3
Answer:
Step-by-step explanation:
8x+2=3
8x=1
x=1/8
MMM HEY PLEASE HELP. IM LITERALLY ABOUT TO END MYSELF.
Answer:
do not end urself please ur a good guy
Step-by-step explanation:
it's b not d
Which ordered pairs are solutions to the system of inequalities?
More than one answer
y ≥ x + 2
y > -5/2x - 3.
A. (0,0)
B. (-2,2)
C. (0,2)
D. (-1,6)
Answer:
C, D
Step-by-step explanation:
We can solve this graphically and analytically.
Graphically, looking at the attached image below, if we graph the two inequalities and plot the points, you can find the points which are solutions by finding the points in the overlapping area.
This obviously excludes A as it only appears in [tex]y \geq x+2[/tex]
C is included as y [tex]\geq x+2[/tex] includes the point on the line.
D is obviously a solution.
B is however not a solution because is lies on the line [tex]y = \frac{-5x}{2} - 3[/tex], which the inequality excludes.
Analytically, if we can find one of the two inequalities where it is not a solution, it is not a solution of the system.
A: (0, 0)
[tex]y \geq x+2\\0 \geq 0 + 2\\0 \geq 2\\false[/tex]
A is not a solution
B: (-2, 2)
[tex]y \geq x+2\\2 \geq -2 + 2\\2\geq 0\\true[/tex]
[tex]y > \frac{-5x}{2} -3\\2 > \frac{-5(-2)}{2} - 3\\2 > 5 - 3\\2 > 2\\false[/tex]
B is not a solution
C: (0, 2)
[tex]y \geq x+2\\2 \geq 0 + 2\\2 \geq 2\\true\\\\y>\frac{-5x}{2}-3\\2 > -3\\true[/tex]
C is a solution
D:
[tex]y \geq x + 2\\6 \geq -1 + 2\\6 \geq 1\\true\\\\y > \frac{-5x}{2} - 3\\6 > \frac{-5(-1)}{2} - 3\\6 > \frac{5}{2} - \frac{6}{2}\\6 > \frac{-1}{2}\\true[/tex]
D is a solution
Find the slope and y intercept from the
table below
x
1-3
1-2
-1
O
1
1
2
У
-16
1-10
-4
2
8
14
Answer:
100
Step-by-step explanation: : )
.
How many 1/4 cups servings are in 5/8 cup. HELP PLEASE
Answer:
2/5
Step-by-step explanation:
You need to divide 1/4 by 5/8
Keep change flip- 1/4*8/5
the answer is 8/20
simplified- 2/5
decimal form- 0.4
[tex]\frac{5}{32}[/tex] [tex]many\ 1/4 \ cups\ servings\ are\ in\ 5/8\ cup.[/tex]
What is division?Division can be defined as the splitting of a large group into smaller groups such that every group will have an equal number of items. It is an operation used for equal grouping and equal sharing in math.
According to the question
Number of 1/4 cups servings are in 5/8 cup:
Based on the given conditions:
= [tex]\frac{5}{8} \div\frac{1}{4}[/tex]
= [tex]\frac{\frac{5}{8} }{\frac{1}{4} }[/tex]
= [tex]\frac{5}{8\times4}[/tex]
= [tex]\frac{5}{32}[/tex]
[tex]\frac{5}{32}[/tex] [tex]many\ 1/4 \ cups\ servings\ are\ in\ 5/8\ cup.[/tex]
Find out more information about division here
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Graph the following linear inequalities y<_1/2x-4
Answer:
Step-by-step explanation:
y ≤ [tex]\frac{1}{2}[/tex] x - 4
Alexa has paper rectangles of different sizes of a rectangle is 7 cm longer than it is with is there a proportional relationship between the length and width of these rectangles
help me pls pls pls
Answer:
11/50
Step-by-step explanation:
22/100 can b reduced to 11/50 :)
what is y equals 5 times x equal
Answer:
multiple possibilities
Step-by-step explanation:
Y=5x
yx=5
it is unsolvable but have various possible answers:
y=5
x=1
(vise versa)
————
y=2.5
x=2
(vise versa)
Please answer this question:
Which confidence level has the largest percent containing the population mean? Circle one.
Please answer fast
Answer:
95%
Confidence levels range from 80% to 99%,with the most common confidence level being 95%.
Choosing a Confidence Level for a Population Sample.
Confidence Level z*-value
Factor f(x)= 2x^4 -12x^3 +6x +20x
Answer:
f(x)= 2x(x^3-6x^2+13)
Helppppp BRAINLEST if right ASAP
Answer:
21.9
Step-by-step explanation:
help asap plsplspls!! :)
Answer:
1.7
Step-by-step explanation:
1 + 7/10
= 1 + 0.7
= 1.7
please help answer this question
Answer:
x>-2
Step-by-step explanation:
Answer:
[tex]x > - 2[/tex]
Step-by-step explanation:
hope u got it.
the line passing through the points (-2,12) and (3, -23) intersects the line passing through which of these pairs of points
Answer:
Options (1), (2) and (3)
Step-by-step explanation:
To solve this problem we will use the property,
"A system of equations will have a unique solution if slopes of the linear equations are different"
Slope of a line passing through two points [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
Slope of a line passing through (-2, 12) and (3, -23) = [tex]\frac{12+23}{-2-3}[/tex] = (-7)
Option (1)
Slope of a line passing through (-4, 17) and (5, -28) = [tex]\frac{17+28}{-4-5}[/tex] = (-5)
Option (2)
Slope of a line passing through (-2, 16) and (2, -20) = [tex]\frac{16+20}{-2-2}[/tex] = (-9)
Option (3)
Slope of a line passing through (-6, 14) and (4, -16) = [tex]\frac{14+16}{-6-4}[/tex] = (-3)
Option (4)
Slope of a line passing through (-3, 19) and (6, -44) = [tex]\frac{19+44}{-3-6}[/tex] = (-7)
Option (5)
Slope of a line passing through (-5, 32) and (3, -24) = [tex]\frac{32+24}{-5-3}[/tex] = (-7)
Slopes of options (1), (2) and (3) are different.
Therefore, Options (1), (2) and (3) will be the correct options.
Andre received and spent money in the following ways last month.Write a positive or negative number to represent money from his perspective. "Andre spent $10 on a book"
Step-by-step explanation:
Let the amount of money Andre has be $A.
Spending $10 on a book = A - 10
If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!
please help marking brainliest if its correct!
Answer:
I would say B.120 minutes
The Bartlett family is taking a road trip to Yellowstone National Park! Yesterday, they drove a total of 550 miles in 11 hours. Today, they will drive another 200 miles and arrive at the park.
If the Bartletts drive at the same average rate, how long will they drive today?
Answer:
4 hours is the answer
Step-by-step explanation:
If the Bartletts drive at the same average rate, today they must have derived for 4 hours.
Given that,
They drove a total of 550 miles in 11 hours. Today, they will drive another 200 miles and arrive at the park. If the Bartletts drive at the same average rate, how long will they drive today is to be determined.
Distance is defined as the object traveling at a particular speed in time from one point to another.
Here,
Speed = distance/time
Speed = 550 / 11 = 50 miles per hour
Again,
Speed = distance/time
50 = 200 / time
time = 4 hours,
Thus, If the Bartletts drive at the same average rate, today they must have derived for 4 hours.
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Ben can address the weekly newsletters in 4 hours, Charlie can address them in 3 hours. How long would it take
them to address the newsletters if they work together?
The combined height of the world’s three tallest buildings is 6,360 feet. The building in Dubai is 745 feet taller than the building in Makkah. Taipei’s building is 301 feet shorter than Makkah’s.
The equation (x + 745) + x + (x – 301) = 6,360 represents the scenario.
What can be determined from the given information? Check all that apply.
x represents the height of the building in Dubai.
The expression (x – 301) represents the height of the building in Taipei.
The building in Makkah is 1,972 feet tall.
The height of Dubai’s building is 1,227 feet tall.
The height of Taipei’s building is 1,671 feet tall.
Answer:
B, C, and E are correct
Step-by-step explanation:
Answer:
the answers are B, C, and E
Step-by-step explanation:
got it right on edge 2021 hope this helped! :]
-4.75=z/2
PLEASE HELP............
Answer: Z= -9.5
Step-by-step explanation:
write the division as a fraction
-4.75=1/2Z
Multiply both sides of the equation by 2
-9.5=Z
then swap the sides of the equation
Z= -9.5
And if they are asking for fraction form then its either
Z= - 19/2, or Z= -9 1/2
what would be the square root of 144 is it 12?
Answer:
yes the square root of 144 is 12
Step-by-step explanation:
12 x 12 = 144 and 144 divided by 12 = 12
Write -16.3 as a mixed number.
Answer:
-690/1000
Step-by-step explanation:
Is this right need answer ASAP
how many solutions are in -2(6-3x)=-12+6x ?
Answer:
For this equation there are infinite solutions.
Step-by-step explanation:
-2(6-3x)=-12+6x
-12+6x= -12 + 6x
-6 -6
-12 = -12
0 = 0
The sales tax is $53 on the purchase of a dining room set for $1325. Find the sales tax rate.
Answer:
25
Step-by-step explanation:
1325 / 53 = 25
can someone help me with this
Answer: The answer is (19, 17), (20, 18), (21, 19), (22, 20), and (23, 21).
Step-by-step explanation:
Simplify completely ASAPP
Answer:
5[tex]\sqrt{2}[/tex]
Step-by-step explanation:
