Learning Materials
Features
Discover
Chapter 11: Q. 5 (page 734)
T11.5. We compute the value of thestatistic to be . Assuming that the conditions for inference are met, the P-value of our test is
(a) greater than
(b) between and .
(c) between and .
(d) between and
(e) less than
Over 30 million students worldwide already upgrade their learning with 91影视!
All the tools & learning materials you need for study success - in one app.
Get started for free
The cell in the table that contributes the most to the chi-square statistic is (a) Female, chance.
(b) Male, chance.
(c) Female, almost certain.
(d) Male, almost certain.
(e) All the cells contribute equally to the test statistic.
What is the most important reason that students buy from catalogs? The answer may differ for different groups of students. Here are results for separate random samples of American and Asian students at a large midwestern university
(a) Should we use a chi-square test for homogeneity or a chi-square test of association/independence in this setting? Justify your answer. (b) State appropriate hypotheses for performing the type of test you chose in part (a). Minitab output from a chi-square test is shown below.
(c) Check that the conditions for carrying out the test are met.
(d) Interpret the P-value in context. What conclusion would you draw?
Calculate the expected count for each color, assuming that the company鈥檚 claim is true. Show your work.
Let鈥檚 continue our analysis of Joey鈥檚 sample of M&M鈥橲 Peanut Chocolate Candies from the previous Check Your Understanding (page 681). Here is the brief intro of the question:
Candies are produced according to the following color distribution: 23% each of blue and orange, 15% each of green and yellow, and 12% each of red and brown. Joey bought a bag of Peanut Chocolate Candies and counted the colors of the candies in his sample: 12 blue, 7 orange, 13 green, 4 yellow, 8 red, and 2 brown.
1. Confirm that the expected counts are large enough to use a chi-square distribution. Which distribution (specify the degrees of freedom) should we use?
Birds in the trees Researchers studied the behavior of birds that were searching for seeds and insects in an Oregon forest. In this forest, % of the trees were Douglas 铿乺s, % were ponderosa pines, and % were other types of trees. At a randomly selected time during the day, the researchers observed red-breasted nuthatches: were seen in Douglas 铿乺s, in ponderosa pines, and in other types of trees. Do these data suggest that nuthatches prefer particular types of trees when they鈥檙e searching for seeds and insects? Carry out a chi-square goodness-of-铿乼 test to help answer this question.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Flashcards 
91影视 AI 
Notes 
Study Plans 
Study Sets 
Find a degree 
Magazine