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5. A sample of 40 sales receipts from a grocery store has X-bar=$137. Suppose it is known that the population standard deviation for receipts is $30.2. Use these values to test, at the 99% confidence level, whether or not the mean sales at the grocery store is different from $150.

5. A sample of 40 sales receipts from a grocery store has X-bar=$137. Suppose it is known that the population standard deviation for receipts is $30.2. Use these values to test, at the 99% confidence level, whether or not the mean sales at the grocery store is different from $150.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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write    out    each    of    the    four    steps    of    hypothesis    testing:    (1)    
write    down    the    null    and    alternative    hypotheses,    (2)    calculate    the    test    statistic    (t    or    z)    based    on    the    
data    in    the    problem,    (3)    draw    the    rejection    region,    indicating    t*    or    z*,    (4)    conclude    and    write    a    one    
sentence    conclusion (what    this    result    means,    in    plain    English).        Use    a    5%    level    of    significance,    
unless    otherwise    instructed.

 

 

5. A sample of 40 sales receipts from a grocery store has X-bar=$137. Suppose it is known that the population standard deviation for receipts is $30.2. Use these values to test, at the 99% confidence level, whether or not the mean sales at the grocery store is different from $150.
Transcribed Image Text:5. A sample of 40 sales receipts from a grocery store has X-bar=$137. Suppose it is known that the population standard deviation for receipts is $30.2. Use these values to test, at the 99% confidence level, whether or not the mean sales at the grocery store is different from $150.
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