Chapter 11: Q 56 (page 658)
The appropriate test is test for homogeneity
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Read the statement and decide whether it is true or false:
In a goodness-of-fit test, the expected values are the values we would expect if the null hypothesis were true.
What are the null and alternative hypotheses for a math teacher who sees if two of her classes have the same distribution of test scores.
The Bureau of Labor Statistics gathers data about employment in the United States. A sample is taken to calculate the number of U.S. citizens working in one of several industry sectors over time. Table 11.17 shows the results:
We want to know if the change in the number of jobs is independent of the change in years. State the null and alternative hypotheses and the degrees of freedom .
A market researcher wants to see if two different stores have the same distribution of sales throughout the year. What type of test should he use?
The table provides a recent survey of the youngest online entrepreneurs whose net worth is estimated at one million dollars or more. Their ages range from to . Each cell in the table illustrates the number of entrepreneurs who correspond to the specific age group and their net worth. Are the ages and net worth independent? Perform a test of independence at the significance level.
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