4.04 Hypothesis Testing Single Mean: Problem 9 Previous Problem Problem List Next Problem (1 point) In a sample of 40 grown-ups, the mean assembly time for a boxed swing set was 1.65 hours with a standard deviation of 1.15291 hours. The makers of this swing set claim the average assembly time is less than 2 hours. (a) Find the test statistic. (b) Test their claim at the 0.01 significance level. Critical value: Is there sufficient data to support their claim? Yes No (c) Test their claim at the 0.05 significance level. Critical value: Is there sufficient data to support their claim? Yes No