why why hot? 52. Foot Locker Store Productivity. Foot Locker uses sales per square foot as a measure of store productivity. Sales are currently running at an annual rate of $406 per square foot. You have been asked by management to conduct a study of a sample of 64 Foot Locker stores. Assume the standard deviation in annual sales per square foot for the population of all 3400 Foot Locker stores is $80. a. Show the sampling distribution of x, the sample mean annual sales per square foot for a sample of 64 Foot Locker stores. b. What is the probability that the sample mean will be within $15 of the population mean? c. Suppose you find a sample mean of $380. What is the probability of finding a sample mean of $380 or less? Would you consider such a sample to be an unusually low-performing group of stores? lonorting from Buffalo Niagara

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Bulation standard deviation is $2500.
a. Show the sampling distribution of the mean amount of health care expenditures
for a sample of 100 people.
b. What is the probability the sample mean will be within ±$200 of the population
mean?
c. What is the probability the sample mean will be greater than $12,000? If the sur-
vey research firm reports a sample mean greater than $12,000, would you question
whether the firm followed correct sampling procedures? Why or why not?
52. Foot Locker Store Productivity. Foot Locker uses sales per square foot as a measure
of store productivity. Sales are currently running at an annual rate of $406 per square
foot. You have been asked by management to conduct a study of a sample of 64 Foot
Locker stores. Assume the standard deviation in annual sales per square foot for the
population of all 3400 Foot Locker stores is $80.
of their health
a. Show the sampling distribution of x, the sample mean annual sales per square
foot for a sample of 64 Foot Locker stores.
b. What is the probability that the sample mean will be within $15 of the population
mean?
c. Suppose you find a sample mean of $380. What is the probability of finding a
sample mean of $380 or less? Would you consider such a sample to be an unusually
low-performing group of stores?
53. Airline Fares. The mean airfare for flights departing from Buffalo Niagara
International Airport during the first three months of 2017 was $320.51. Assume
the standard deviation for this population of fares is known to be $80. Suppose a
1 of 60 flights departing from Buffalo Niagara International Airport
for flights
Transcribed Image Text:Bulation standard deviation is $2500. a. Show the sampling distribution of the mean amount of health care expenditures for a sample of 100 people. b. What is the probability the sample mean will be within ±$200 of the population mean? c. What is the probability the sample mean will be greater than $12,000? If the sur- vey research firm reports a sample mean greater than $12,000, would you question whether the firm followed correct sampling procedures? Why or why not? 52. Foot Locker Store Productivity. Foot Locker uses sales per square foot as a measure of store productivity. Sales are currently running at an annual rate of $406 per square foot. You have been asked by management to conduct a study of a sample of 64 Foot Locker stores. Assume the standard deviation in annual sales per square foot for the population of all 3400 Foot Locker stores is $80. of their health a. Show the sampling distribution of x, the sample mean annual sales per square foot for a sample of 64 Foot Locker stores. b. What is the probability that the sample mean will be within $15 of the population mean? c. Suppose you find a sample mean of $380. What is the probability of finding a sample mean of $380 or less? Would you consider such a sample to be an unusually low-performing group of stores? 53. Airline Fares. The mean airfare for flights departing from Buffalo Niagara International Airport during the first three months of 2017 was $320.51. Assume the standard deviation for this population of fares is known to be $80. Suppose a 1 of 60 flights departing from Buffalo Niagara International Airport for flights
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