A state university wants to increase its retention rate of 4…

A state university wants to increase its retention rate of 4% for graduating students from the previous year.  After implementing several new programs during the last two years, the university reevaluates its retention rate. Describe the consequence of a Type II error in context.

It is recommended that adults get 8 hours of sleep each nigh…

It is recommended that adults get 8 hours of sleep each night.  A researcher hypothesized college students got less than the recommended number of hours of sleep each night, on average.  The researcher randomly sampled 20 college students and found no evidence to reject the null hypothesis at the 5% significance level.  What is true regarding the p-value from this hypothesis test?

The real estate industry claims that it is the best and most…

The real estate industry claims that it is the best and most effective system to market residential real estate.  A survey of randomly selected home sellers in Illinois found that a 95% confidence interval for the proportion of homes that are sold by a real estate agent is 69% to 81%. Interpret the interval in this context

According to a recent Gallup poll, “Americans’ current opini…

According to a recent Gallup poll, “Americans’ current opinions of Planned Parenthood are considerably less favorable than they were in 1993” at 81%.  In the recent poll of 1015 adults, 60% viewed Planned Parenthood favorably.  Is there enough evidence to support the claim at  Do a hypothesis test and interpret your decision for the hypothesis test