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crimeas [40]
2 years ago
14

Do consumers spend more on a trip to Store A or Store​ B? Suppose researchers interested in this question collected a systematic

sample for 85 Store A customers and 82 Store B customers by asking customers for their purchase amount as they left the store. Using the given summary​ statistics, researchers calculated a​ 95% confidence interval for the mean difference between Store A and Store B purchase amounts. The interval was ​($negative 15.96​,$negative 4.04​). Explain in context what this interval means.
Mathematics
1 answer:
FinnZ [79.3K]2 years ago
4 0

Answer:

We can be 95% confident that consumers spend between $4.04 and $15.96 less at Store A than the consumers spend at Store B.

Step-by-step explanation:

Confidence Intervals give an estimate as range of values for a statistic concerned at a <em>confidence level</em>.

In this case the statistic is the mean difference between Store A and Store B purchase amounts and the confidence level is 95%.

Confidence Interval can be calculated using M±ME where

  • M is the sample mean difference between Store A and Store B purchase amounts
  • ME is the margin of error from the mean
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Which equation is the correct translation of the following statement?
leonid [27]
<h3>hello!</h3>

Let the number be x.

subtract 4:-

x-4 (4 less)

this expression equals 9:-

x-4=9 (Option C)

<h3>note:-</h3>

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8 0
2 years ago
1/5 divided 3=1/15 because
Keith_Richards [23]
A number being divided by a number would be the same as a number multiplied by the reciprocal of the other number.

Reciprocal: the “flip” of a fraction (ex. the reciprocal of 6/7 is 7/6)

Example:
5/6 / 1/6
= 5/6*6/1
=30/6
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We can apply the same to the question 1/5 / 3.

1/5 / 3
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I hope this helps! Please comment if you have any questions.
3 0
2 years ago
Can anyone solve this 100+3-4(4-5) divided by 6+5+5+5+300
ioda
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Hope it helps : )
8 0
2 years ago
Hernan cuts a board that is 7/10 of a meter long After the cut the board is 3/10 of a meter long how long is the piece that he c
Darina [25.2K]

Given that original lenght of the board before cut = \frac{7}{10}meter

Lenght of the board that is left after cutting from the original piece by Hernan = \frac{3}{10}meter


Now we have to find the lenght of the piece which is cut.

To find that we just need to subtract smaller piece from larger piece


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Required Length = \frac{7-3}{10}meter

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7 0
3 years ago
Read 2 more answers
? divided by 2/3= 3/8
NeX [460]
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3 0
3 years ago
Read 2 more answers
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