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  3. do male and female skiers differ in their tendency

Do male and female skiers differ in their tendency to use a ski helmet? Ruzic and...

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Statistics

Do male and female skiers differ in their tendency to use a skihelmet? Ruzic and Tudor (2011) report a study in which 710 skierscompleted a survey about aspects of their skiing habits. Supposethe results from the question on the survey about ski helmet usagewere as follows:

Male helmet usage : Never, ocassionally, Always

244, 58, 192

Female helmet use: 103, 37, 76

Part a)
Which of the following null hypotheses could sensibly be tested bythe data presented above?


a. The mean number of male skiers who never wear aski helmet is the same as the mean number of female skiers whonever use one.
b. Male and female skiers are as likely to neveruse a ski helmet as always use one.
c. There is no relationship between Gender andHelmet usage.

Part b)
Under the null hypothesis, what is the expected number of men inthe survey who never wear a ski helmet?

Part c)
Perform a suitable test on the data above to test the nullhypothesis.

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