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 880 cases in which 396 bystanders performed CPR correctly.Test this hypothesis at the 0.05 significance level.

Round-off your answers correct to 2 decimal places.

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 -for Type I error.

Type 2 -for Type 2 error.