Chapter 11: Q.27 (page 656)
Short Answer
The degree of freedom.
Chapter 11: Q.27 (page 656)
The degree of freedom.
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Get started for freeThe Insurance Institute for Highway Safety collects safety information about all types of cars every year, and publishes a report of Top Safety Picks among all cars, makes, and models. Table 11.58 presents the number of Top Safety Picks in six-car categories for the two years 2009 and 2013. Analyze the table data to conclude whether the distribution of cars that earned the Top Safety Picks safety award has remained the same between 2009 and 2013. Derive your results at the 5%
significance level.
Read the statement and decide whether it is true or false.
The test for independence uses tables of observed and expected data values.
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 .
Some travel agents claim that honeymoon hot spots vary according to the age of the bride. Suppose that recent brides were interviewed as to where they spent their honeymoons. The information is given in Table . Conduct a test of independence
Location | and over | |||
Niagara Falls | ||||
Poconos | ||||
Europe | ||||
Virgin Islands |
Do men and women select different breakfasts? The breakfasts ordered by randomly selected men and women at a popular breakfast place are shown in Table. Conduct a test for homogeneity at a level of significance.
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