How do you do longhand

(a) Write the claim mathematically and identify and . Let represent the population variance. Recall that the null

hypothesis must include equality, so the claim from the problem statement becomes the null hypothesis.

(b) Find the critical value(s) and identify the rejection region(s).

(c) Find the standardized test statistic . Compute the standardized test statistic using the formula below. Let represent

the sample variance and n represent the sample size. The result is rounded to two decimal places.

(d) Decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original

claim.

A snack food manufacturer estimates that the variance of the number of grams of carbohydrates in servings of its tortilla chips is 1.21. A dietician is asked to test this claim and finds that a random sample of 19 servings has variance of 1.32. At 1.21 He : of # 1.21 O C. H: 02 # 1.21 OD. H: 7 2 1.21 Ha: 0