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A new technology company is interested in seeing if there is a difference be- tween males and females in relation to the number of times they use...
A new technology company is interested in seeing if there is a difference be- tween males and females in relation to the number of times they use their mobile fitness app daily. They take a random sample of 1000 users and look at the number of times the users checked the app the previous day. The analysis showed that 65 males and 43 females didn't check the app at all, 384 males and 340 females checked between 1 and 3 times and 98 males and 70 females checked the app more than 3 times.
(i) Construct an appropriate table or graph to display the results (note: graph paper not required).
(ii) Researchers are interested in seeing if the data presents evidence to indi- cate that the number of times the fitness app is checked is dependent on gender.
A. State the appropriate null and alternative hypotheses.
B.What is an appropriate test statistic to use?
C. If the appropriate test statistic is calculated, and is found to be equal to 2.99, complete the hypothesis test and interpret the results of the test in the context of the question. iii)Comment on the validity of the test used in part
iv) Construct and interpret a 95% confidence interval for the proportion of males who use the app at least once?
v)In general, what 3 things affect the width of a confidence interval?
