Answer:
A 90% confidence interval for the mean number of letter sounds identified in one minute is: (30.84, 37.34).
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1 - 0.9}{2} = 0.05[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].
That is z with a pvalue of [tex]1 - 0.05 = 0.95[/tex], so Z = 1.645.
Now, find the margin of error M as such
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
[tex]M = 1.645\frac{23.44}{\sqrt{141}}[/tex]
[tex]M = 3.25[/tex]
The lower end of the interval is the sample mean subtracted by M. So it is 34.09 - 3.25 = 30.84.
The upper end of the interval is the sample mean added to M. So it is 34.09 + 3.25 = 37.34.
A 90% confidence interval for the mean number of letter sounds identified in one minute is: (30.84, 37.34).
What is the diameter of the circle?
12 inches
A
6 inches
B
24 inches
с
26 inches
D
48 inches
Use formulas to find area
Answer:
120.08
Step-by-step explanation:
15.8 x 7.6
-> 120.08 [tex]m^2\\[/tex]
In general, the larger a sample is: a. The more difficult it becomes to avoid atypical cases. b. The greater the standard deviation becomes. c. The smaller the standard deviation becomes. d. The more closely it represents the population. e. The more likely it is that it will be biased.
Answer:
d
Step-by-step explanation:
Larger samples more closely resemble the population from which they come.
Think of the difference between sampling hundreds of people from a town, perhaps asking them if they've ever ordered fast food. If you go to McDonald's and ask customers as they come out, you wouldn't expect those answers to represent the entire population of the town, right?
The ratio of yellow blocks to red blocks is 3:5, and the ratio of blue blocks to red blocks is 7:2.
What is the ratio of yellow blocks to blue blocks?
=========================================================
Explanation:
The ratio of yellow to red is 3:5. This could mean we have any of the following situations (pick one):
3 yellow, 5 red6 yellow, 10 red9 yellow, 15 redand so on. In general, we would have 3x yellow blocks and 5x red blocks. The ratio 3x:5x reduces to 3:5 when dividing both parts by x. The x is some positive whole number. The order is important because yellow must be listed first, then red second.
The same idea applies to the other ratio 7:2, which is the blue to red. In that case, we could have...
7 blue, 2 red14 blue, 4 red21 blue, 6 red28 blue, 8 red35 blue, 10 red42 blue, 12 redand so on. Notice that items in bold (in each list) have "10 red" as part of it. This is directly from the fact we multiply the 5 and 2 to get 5*2 = 10.
So we can connect the two ratios to have: 6 yellow, 10 red, 35 blue.
The ratio of yellow to blue is 6:35. This is the final answer. We cannot reduce this ratio any further due to 6 and 35 having no common factors other than 1. It's the same as saying the fraction 6/35 can't be reduced further.
Jamie wants to make a playlist with 8 songs on her iPod. She has 50 songs to choose from, including 15 songs from Maroon 5. Janine's iPod won't allow any song to appear more than once in a playlist. How many 8-song playlists contain no songs by Maroon 5? Suppose Janine decides to let her iPod select an 8-song playlist at random.
Answer:
the answer is that she would have to pick 4and let the iPod pick 4
Cassie is going to dinner and a movie with some friends. The movie starts at 7:30 p.m. The restaurant
is 15 minutes from the theater, and dinner will take one hour. If Cassie
lives 20 minutes from the restaurant, what time should she leave her house?
Answer:5:55pm
Step-by-step explanation:
7:30-0:20=7:10-1:00=6:10-0:15=5:55pm
What is the length of a 50-inch TV that has a width of 27 inches?
What is the area of this TV?
which of the following functions has a vertex of (-4,3) and a line symmetry of x= -4?
a) f (x) = 2( x + 4)² -3
b) f (x) = 2( x - 4)² +4
c) f (x) = 2( x + 4)² +3
d) f (x) = 2( x - 3)² +4
e) f (x) = 2( x - 4)² +3
Answer:
answer: d
Step-by-step explanation:
QUICK PLEASE HELP!!
I WILL MARK BRAINLIEST!!!
In London today, twice the low temperature was less than three times
the low temperature minus ten. In interval form, what are the possible
temperatures?
Zahra runs an activity club
She needs 2 members of staff for every 15 people at the activity club.
There will be 90 people at the activity club on Monday
Zahra has 10 members of staff available for Monday.
Does Zahra have enough staff available for Monday?
(3)
Answer:
No, Zahra does not have enough staff available
Step-by-step explanation:
Given
[tex]Ratio = 2 : 15[/tex] --- staff to people
[tex]Staff = 10[/tex]
[tex]People = 90[/tex]
Required
Are there enough staff?
Start by representing the data as a ratio
[tex]Ratio = Staff : People[/tex]
So, we have:
[tex]Ratio = 10 : 90[/tex]
Divide by 10
[tex]Ratio = 1 : 9[/tex]
Multiply by 2
[tex]Ratio = 2 : 18[/tex]
This means that, she has 2 members of staff for every 18 people (instead of the expected 2 to 15 people)
Hence, Zahra does not have enough staff available
What steps to get the principle of a 30 year loan at 5.5%?
4 x 32 – 3+5 x 2 =
el
Answer:
4x32-3+5x2=
128-3+5x2
128-3+10
128+7=
135
LUVP is an example of:
Each week, the price of oranges at the farmer's market increases by 20%.
The price of oranges this week is $4.50.
What was the price last week?
Will give brainliest to correct answer.
The price of orange last week was $3.75
An equation is used to show the relationship between two or more numbers and variables.
The price of oranges increases by 20% each week.
The price of oranges this week is $4.50. Hence:
Price of orange last week (x) is given by:
4.5 = x + 20% of x
4.5 = x + 0.2x
1.2x = 4.5
x = 3.75
The price of orange last week was $3.75
Find out more on equation at: https://brainly.com/question/24868934
If x
[tex] x = \sqrt[?]{5 } + \sqrt{3} + x + \frac{1}{?x} = [/tex]
Answer:
bh
Step-by-step explanation:
34
Answer:
10 − 3 x = 2 x + 5 \sqrt{10-3x}=\sqrt{2x+5} 10−3x =2x+5 square root of, 10, minus, 3, x, end square root, equals, square root of, 2, x, plus, 5, end square root.
Step-by-step explanation:
4a+(-8), if a= -2 PLZ ANSWER ASAP
Answer:
-16
Step-by-step explanation:
4a+(-8)
4(-2)+(-8)
-8+(-8)
= - 16
1) Simplify the product using the distributive property.
(x-2)(x+4)
Please help me answer this question
solve the exponential equation 2^2x +2^x+1 -8
Answer: can you tell me what the x= to because I can’t solve it like that if you give me what the x= to I tell you the answer
Step-by-step explanation:
Answer:
2^x+4^x-7
Step-by-step explanation:
In circle M with m
Round to the nearest hundredth.
We know that the area of a sector is given by:
[tex]A = \dfrac{\pi r^2\alpha}{360}[/tex]
Where α is the angle in degrees and r is the radius. We have:
r = 9α = 82°Evaluating:
[tex]A = \dfrac{\pi r^2\alpha}{360} = \dfrac{\pi(9)^2\cdot 82}{360} = 57.96\ u^2[/tex]
A A rug is 6 feet long and w feet wide. Which expression
does NOT represent the perimeter of the rug in feet?
Circle the correct answer.
A) 2(67/8+w)
B) 2w-13 6/8
C) 2(67/8+w
D) 6 7/8+ w+ 6 7/8 + w
Answer:C
Step-by-step explanation:
Answer:
2(6 7/8) + w
Step-by-step explanation:
Disclamer: NOT 2(6 7/8 + w)
***Any links will be reported***
****i will mark brainliest****
Answer:
hambuger cheesebuger big mac whooper
Step-by-step explanation:
Answer:
This is easy. Just to help you, and not necessarily cheat, it already tells you what the missing numbers are. So if a is 3, you can just go 2 x 3 x 3. when numbers are together like this, or letters, you multiply. (3(4), or 2a) You do that with the rest of your equations, and you will get your answers. But if this isn't what you having a problem with, then just tell me.
ax - 8 = x + 2
If x = 2 on the equation above, what is the value of a?
Answer:
a=2
Step-by-step explanation:
ax-8=x+2
when x=2
2a-8=2+2
2a=4+8
2a=12
a=12/2=6
HELP ME PLEASEEEEEEEEEEEEEEEEEEE
Answer:
heyy matee...
see
Vertices (V) = 8
Faces (F) = 6
Edges (E) => F + V - E = 2 (EULER'S FORMULA)
so 6 + 8 - 2 = E => E = 12
now just look at options
and however its a common thing that if Vertices are 8 and Faces are 6 and Edges are 12 then it is cube or cuboid
and another name of cuboid is rectangular prism ;)
hence answer is option c - rectangular prism
brainliest possible ?
number 58 i need help with
Answer:
y = -45x + 13
Step-by-step explanation:
The equation is *** y = [tex]-5x^{2}[/tex] - 20x +13 ***
First: you have to look at [tex]-5x^{2}[/tex] which would equal -25x
Second: you have take the -25x and put into the equation... y = -25x - 20x +13
Third: You have subtract -25x - 20x which equals -45x
Lastly: Now you have y = -45x + 13 and since 13 does NOT have a variable like -45x does, you then know that you have finished the equation
12 ft 12 ft 10 ft J. 12 ft 10 ft 12 ft
Answer:
What is your question?
Step-by-step explanation:
The perimeter of the figure below is 152.6 ft. Find the length of the missing side.
Answer:
13.4
Step-by-step explanation:
13.4 is the answer because a perimeter is the total distance around the shape
when you take 152.6 and subtract all of the different sides your left with the length of the last side
152.6 - 13.1 - 13.1 - 9.3 - 54.2 - 9.3 - 27.1 - 13.1 = 13.4
what is quartile 1 and 3
Answer:
Q1 = 2
Q3 = 3
I think that's the answer
Hope this helps! (°◡°♡).:｡
Answer:
Q1 is 2 Q2 is 3
Just cut the list of number into quarters
A convenience store purchased a magazine and marked it up 100% from the original cost of $2.30. A week later, the store placed the magazine on sale for 50% off. What was the discount price?
Answer:
$2.30
Step-by-step explanation:
The original price is $2.30 an it goes up by 100% which means another 2.30. So add 2.30 and 2.30 together you get 4.60 now divide that by two since the magazine is 50% off and you get the original price which was 2.30
The discount price would be an amount of $2.30.
What is the percentage?The percentage is defined as a ratio expressed as a fraction of 100.
For example, If Misha obtained a score of 67% on her exam, that corresponds to 67 out of 100.
The convenience store bought a magazine for $2.30 and increased the price by 100%. A week later, the retailer reduced the price of the magazine by half.
As per the given situation, the required solution would be as:
The original price is $2.30, then it increases by 100%, or another $2.30. So add 2.30 and 2.30 to get 4.60, then split that by two because the magazine is 50% discounted to obtain the original price of 2.30.
⇒ $2.30 + $2.30
⇒ $4.60
⇒ $4.60 / 2
⇒ $2.30
Therefore, the discount price would be amount of $2.30.
Learn more about the percentages here:
brainly.com/question/24159063
#SPJ2
You have $10. If you and 3 of your friends want to go to the movies, what does the ticket price need to be for you to be able to buy all 4 tickets?
Answer:
$2.50
Step-by-step explanation:
$10/4 = $2.50
