Question
In: Statistics and Probability
A hair salon reports that on seven randomly selected weekdays, the number of customers who visited...
A hair salon reports that on seven randomly selected weekdays, the number of customers who visited the salon were 78,31,42,43,51,32,and 31. It can be assumed that weekday customer visit follow a normal distribution.
a) construct the 90% confidence interval for the average number of customers who visit the salon on weekdays ( round intermediate calculations to at least 4 decimal places. Sample mean and sample standard deviation to 2 decimal places and t value to 3 decimals and final answer to 2 decimals)
b) construct the 99% confidence interval for the average numbers of customers who visit the salon on week days.( round intermediate calculations to at least 4 decimal places. Sample mean and sample standard deviation to 2 decimal places and t value to 3 decimals and final answer to 2 decimals)
c) what happens to the width of the interval as the confidence interval increases does it
-become wider and less precise
OR
narrower and less precise
Solutions
orchestra answered 1 year agoRelated Solutions
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A hair salon surveyed 214 customers (103 females and 111 males) to see if they are...
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Satisfied
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30
103
Male
107
4
111
Total
180
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214
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Account Names
Debit
Credit
Further Information
Cash
$
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As reported on December 31 bank statement.
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Val’s Hair Emporium operates a hair salon. Its unadjusted trial balance as of December 31, 2018, follows, along with information about selected accounts.
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Account Names
Debit
Credit
Further Information
Cash
$
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As reported on December 31 bank statement.
Supplies
4,500
Based on count, only $1,400 of supplies still exist.
Prepaid Rent
6,600
This amount...
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