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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 35, 30, 28, 12, 36, 16 and 50. The population standard deviation is not given to us. Construct a 90% confidence interval for the average number of customers who visit the salon on weekdays. Interpret this. Now we have been told that we can use a normal distribution with a population standard deviation of 6. Construct a 95% confidence interval for the average number of customers who visit the salon on weekdays.
Solutions
milcah answered 5 months agoRelated Solutions
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...
A hair salon in Cambridge, Massachusetts, reports that on seven randomly selected weekdays, the number of...
A hair salon in Cambridge, Massachusetts, reports that on seven
randomly selected weekdays, the number of customers who visited the
salon were 41, 64, 43, 28, 54, 44, and 56. It can be assumed that
weekday customer visits follow a normal distribution. [You
may find it useful to reference the t table.]
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...
The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the...
The manager of The Cheesecake Factory in Boston reports that on
six randomly selected weekdays, the number of customers served was
120, 130, 100, 205, 185, and 220. She believes that the number of
customers served on weekdays follows a normal distribution.
Construct the lower bound of the 90% confidence interval for the
average number of customers served on weekdays. (Round the sample
standard deviation to 2 decimal places, the "t" value to 3 decimal
places, and the final answer...
Customers arrive at a hair salon according to a Poisson process with an average of 16...
Customers arrive at a hair salon according to a Poisson process
with an average of 16 customers per hour. The salon has just one
worker due to covied-19 restriction. Therefore, the salon must
close whenever the worker leaves. assume that customers who arrive
while the salon is closed leave immediately and don’t wait until
the worker returns. The salon is closed on weekends.
a.
What is the probability that at most (less than) four customers
arrive in the hour before...
A hair salon surveyed 214 customers (103 females and 111 males) to see if they are...
A hair salon surveyed 214 customers (103 females and 111 males)
to see if they are satisfied with the service. The result is
summarized in the following table.
Satisfied
Not Satisfied
Total
Female
73
30
103
Male
107
4
111
Total
180
34
214
1. If a customer is randomly selected from these 214 people, the
probability that he/she is satisfied is .
(Please round your answer to two decimal places.)
2. If we know the selected customer is a female,...
The table below gives the number of hours seven randomly selected students spent studying and their...
The table below gives the number of hours seven randomly
selected students spent studying and their corresponding midterm
exam grades. Using this data, consider the equation of the
regression line, yˆ=b0+b1x, for predicting the midterm exam grade
that a student will earn based on the number of hours spent
studying. Keep in mind, the correlation coefficient may or may not
be statistically significant for the data given. Remember, in
practice, it would not be appropriate to use the regression line...
The table below gives the number of hours seven randomly selected students spent studying and their...
The table below gives the number of hours seven randomly
selected students spent studying and their corresponding midterm
exam grades. Using this data, consider the equation of the
regression line, yˆ=b0+b1x, for predicting the grade that a student
will earn based on the number of hours spent studying. Keep in
mind, the correlation coefficient may or may not be statistically
significant for the data given. Remember, in practice, it would not
be appropriate to use the regression line to make...
The number of students who belong to the dance company at each of several randomly selected...
The number of students who belong to the dance company at each
of several randomly selected small universities is shown below.
Round sample statistics and final answers to at least one decimal
place.
28 22 21 22 35 35 40 30 40 27 40 32 30 30 29 26 29
Estimate the true population mean size of a university dance
company with 98% confidence. Assume the variable is normally
distributed.
Val’s Hair Emporium operates a hair salon. Its unadjusted trial balance as of December 31, 2018, follows, along with information about selected accounts.
Val’s Hair Emporium operates a hair salon. Its unadjusted trial balance as of December 31, 2018, follows, along with information about selected accounts.
Account Names
Debit
Credit
Further Information
Cash
$
4,800
As reported on December 31 bank statement.
Supplies
5,300
Based on count, only $1,800 of supplies still exist.
Prepaid Rent
9,000
This amount...
Val’s Hair Emporium operates a hair salon. Its unadjusted trial balance as of December 31, 2018, follows, along with information about selected accounts.
Val’s Hair Emporium operates a hair salon. Its unadjusted trial balance as of December 31, 2018, follows, along with information about selected accounts.
Account Names
Debit
Credit
Further Information
Cash
$
4,000
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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