Suppose that a labor union claims that a given procedure requires 20 minutes to perform. To evaluate this, suppose that we measured the amount of time required to complete the procedure on each of 36 occasions. Assuming we wish to be 95% certain of avoiding a Type I error, use these data to evaluate the union's claim. Include the hypotheses (both null and alternate), alpha, test statistic (highlight where it is calculated on your spreadsheet), decision, conclusion
12, 15, 18, 14, 19, 21, 16, 17, 18, 13, 19, 21, 22, 15, 16, 17, 18, 22, 23, 14, 16, 18, 23, 13, 16, 18, 19, 15, 13, 21, 23, 14, 15, 16, 17, 21