Question: Manufacturing and Product Development The Liberty Stone Vista standard unit is manufactured to weigh 70 pounds.77 This double-sided stone is part of a wall system for residential and commercial retaining walls. Large variability in the weight of these stones could cause structural deficiencies in a wall. A random sample of 17 standard units was obtained and the sample variance was 7.75 pounds2.
a. Is there any evidence to suggest that the population variance is greater than 4 pounds2? Assume normality and use a = 0.05.
b. Find bounds on the p value for this hypothesis test.