A study of fast-food intake is described in the paper study "What People Buy From Fast-Food Restaurants" (obesity [2009]: 1369-1374). Adult customers at three hamburger chains (McDonald's, Burger King, and Wendy's) at lunchtime in New York City were ap- proached provide their receipt when exiting. The receipts were then used to determine what was purchased and the number of calories consumed was determined. In all, 3857 people participated in the study. The saole mean number of calories consumed was 857 ani the sample standard deviation was 677. as they entered the restaurant and asked to 10 a. The sample standard deviation is quite large. What does this tell you about number of calories consumed in a hamburger-chain lunchtime fast-food purchase in New York City? b. Given the values of the sample mean and standard deviation and the fact that the number rcises answered in back Data set available online Video Sol of calories consumed can't be negative, explain why it is not reasonable to assume that the distribution of calories consumed is normal. R c. Based on a recommended daily intake of 2000 calories, the online Healthy Dining Finder (www.healthydiningfinder.com) recommends a target of 750 calories for lunch. Assuming that it is reasonable to regard the sample of 3857 fast-food purchases as representative of all hamburger-chain lunchtime purchases in New York City, carry out a hypothesis test to determine if the sample provides convincing evidence that N the mean number of calories in a New York City hamburger-chain lunchtime purchase is greater than the lunch recommendation of 750 calories. Use a = .01. (Hint: See Example 10.15.) dam d. Would it be reasonable to generalize the conclusion of the test in Part (c) to the lunchtime fast-food purchases of all adult Americans? Explain why or why not. e. Explain why it is better to use the customer receipt to determine what was ordered rather than just asking a customer leaving the restaurant what he or she purchased. f. Do you think that asking customers before they order to provide a receipt when they leave could have introduced a potential bias? Explain.
A study of fast-food intake is described in the paper study "What People Buy From Fast-Food Restaurants" (obesity [2009]: 1369-1374). Adult customers at three hamburger chains (McDonald's, Burger King, and Wendy's) at lunchtime in New York City were ap- proached provide their receipt when exiting. The receipts were then used to determine what was purchased and the number of calories consumed was determined. In all, 3857 people participated in the study. The saole mean number of calories consumed was 857 ani the sample standard deviation was 677. as they entered the restaurant and asked to 10 a. The sample standard deviation is quite large. What does this tell you about number of calories consumed in a hamburger-chain lunchtime fast-food purchase in New York City? b. Given the values of the sample mean and standard deviation and the fact that the number rcises answered in back Data set available online Video Sol of calories consumed can't be negative, explain why it is not reasonable to assume that the distribution of calories consumed is normal. R c. Based on a recommended daily intake of 2000 calories, the online Healthy Dining Finder (www.healthydiningfinder.com) recommends a target of 750 calories for lunch. Assuming that it is reasonable to regard the sample of 3857 fast-food purchases as representative of all hamburger-chain lunchtime purchases in New York City, carry out a hypothesis test to determine if the sample provides convincing evidence that N the mean number of calories in a New York City hamburger-chain lunchtime purchase is greater than the lunch recommendation of 750 calories. Use a = .01. (Hint: See Example 10.15.) dam d. Would it be reasonable to generalize the conclusion of the test in Part (c) to the lunchtime fast-food purchases of all adult Americans? Explain why or why not. e. Explain why it is better to use the customer receipt to determine what was ordered rather than just asking a customer leaving the restaurant what he or she purchased. f. Do you think that asking customers before they order to provide a receipt when they leave could have introduced a potential bias? Explain.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Related questions
Question
![A study of fast-food intake is described in the paper
study
"What People Buy From Fast-Food Restaurants"
(obesity [2009]: 1369-1374). Adult customers at three
hamburger chains (McDonald's, Burger King, and
Wendy's) at lunchtime in New York City were ap-
proached
provide their receipt when exiting. The receipts were
then used to determine what was purchased and
the number of calories consumed was determined.
In all, 3857 people participated in the study. The
saole mean number of calories consumed was 857
ani the sample standard deviation was 677.
as they entered the restaurant and asked to
10
a. The sample standard deviation is quite large.
What does this tell you about number of calories
consumed in a hamburger-chain lunchtime
fast-food purchase in New York City?
b. Given the values of the sample mean and
standard deviation and the fact that the number
rcises answered in back
Data set available online
Video Sol](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Facd332b8-c662-4c69-ab89-69f094cdc4fd%2Fb423fde6-07b1-490e-999e-149437aff38e%2Fqs8mbzn.jpeg&w=3840&q=75)
Transcribed Image Text:A study of fast-food intake is described in the paper
study
"What People Buy From Fast-Food Restaurants"
(obesity [2009]: 1369-1374). Adult customers at three
hamburger chains (McDonald's, Burger King, and
Wendy's) at lunchtime in New York City were ap-
proached
provide their receipt when exiting. The receipts were
then used to determine what was purchased and
the number of calories consumed was determined.
In all, 3857 people participated in the study. The
saole mean number of calories consumed was 857
ani the sample standard deviation was 677.
as they entered the restaurant and asked to
10
a. The sample standard deviation is quite large.
What does this tell you about number of calories
consumed in a hamburger-chain lunchtime
fast-food purchase in New York City?
b. Given the values of the sample mean and
standard deviation and the fact that the number
rcises answered in back
Data set available online
Video Sol
Transcribed Image Text:of calories consumed can't be negative, explain
why it is not reasonable to assume that the
distribution of calories consumed is normal.
R c. Based on a recommended daily intake of
2000 calories, the online Healthy Dining Finder
(www.healthydiningfinder.com) recommends a
target of 750 calories for lunch. Assuming that
it is reasonable to regard the sample of 3857
fast-food purchases as representative of all
hamburger-chain lunchtime purchases in New
York City, carry out a hypothesis test to determine
if the sample provides convincing evidence that
N the mean number of calories in a New York City
hamburger-chain lunchtime purchase is greater
than the lunch recommendation of 750 calories.
Use a = .01. (Hint: See Example 10.15.)
dam d. Would it be reasonable to generalize the
conclusion of the test in Part (c) to the lunchtime
fast-food purchases of all adult Americans?
Explain why or why not.
e. Explain why it is better to use the customer
receipt to determine what was ordered rather
than just asking a customer leaving the restaurant
what he or she purchased.
f. Do you think that asking customers before they
order to provide a receipt when they leave could
have introduced a potential bias? Explain.
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