Question

For each question, indicate whether it is best assessed by using a confidence interval or a hypothesis test or whether statistical inference is not relevant to answer it. If inference is not relevant, explain why.

A. What percent of U.S. voters support instituting a national kindergarten through 12th grade math curriculum?

B. Do basketball players hit a higher proportion of free throws when they are playing at home than when they are playing away?

C. Do a majority of adults riding a bicycle wear a helmet?

D. On average, were the 23 players on the 2010 Canadian Olympic hockey team older than the 23 players on the 2010 U.S. Olympic hockey team?

Answer 1

From the given

A) confidence interval is appropriate for this.

Confidance interval for population proportion of US voters support instituting national kindergarten through 12 th math curriculum

B) we want check the proportion is higher or not

One proportion z test appropriate.

C) hypothesis test is appropriate

Becouse we have to check majority of adult riding byckle use helmet.

D) hypothesis test is appropriate

Becouse we have to check difference in proportion of two populations.