NCAA Softball NCAA rules require the circumference of a softball to be 12 { 0.125
Chapter 10, Problem 18(choose chapter or problem)
NCAA Softball NCAA rules require the circumference of a softball to be 12 { 0.125 inches. A softball manufacturer bidding on an NCAA contract is shown to meet the requirements for mean circumference. Suppose that the NCAA also requires that the standard deviation of the softball circumferences not exceed 0.05 inch. A representative from the NCAA believes the manufacturer does not meet this requirement. She collects a random sample of 20 softballs from the production line and finds that s = 0.09 inch. Is there enough evidence to support the representatives belief at the a = 0.05 level of significance?
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