A newspaper article headline claims that bystanders perform CPR correctly 38% of cases where needed. A healthcare professional believes the percentage is higher. She cites a study of 890 cases in...

A newspaper article headline claims that bystanders perform CPR correctly 38% of cases where needed. A healthcare professional believes the percentage is higher. She cites a study of 890 cases in which 375 bystanders performed CPR correctly. Test this hypothesis at the 0.05 significance level. Round-off your answers correct to 2 decimal places. Tables

a) Find the critical value(s). If there are 2 values (2 –tail test), separate them with a coma.

b) Calculate the test statistic

c) Make a decision. Type a if you choose to "Reject the null hypothesis" Type b if you choose to "Fail to reject the null hypothesis.

d) If your decision is incorrect, what type of error would you be committing?

(Type 1 or 2) Type 1 - for Type I error. Type 2 - for Type 2 error.