A company is developing a new high performance wax for cross country ski racing. In order to justify the price marketing wants, the wax needs
A company is developing a new high performance wax for cross country ski racing. In order to justify the price marketing wants, the wax needs to be very fast. Specifically, the mean time to finish their standard test course should be less than 55 seconds for a former Olympic champion. To test it, the champion will ski the course 8 times. Complete parts a and b below. a) The champion's times (selected at random) are 57.6, 60.8, 50.7, 51.9, 48.6, 48.8, 51.2, and 41.1 seconds to complete the test course. Should they market the wax? Assume the assumptions and conditions for appropriate hypothesis testing are met for the sample. Assume a = 0.05. Perform the appropriate hypothesis test. First determine the hypotheses to test. O A. Ho: H> 55 : = 55 . Ho: = 55 <55 o e. ho: h : #55 . <55 ha: d. *55 55 f. ho #> 55 The test statistic is (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) should the company market the wax? A. No, there is insufficient evidence to conclude the mean time is less than 55 seconds. B. Yes, there is insufficient evidence to conclude the mean time is less than 55 seconds. C. Yes, there is sufficient evidence to conclude the mean time is less than 55 seconds D. No, there is sufficient evidence to conclude the mean time is less than 55 seconds. ) Suppose they decide not to market the wax after the test, but it turns out that the wax really does lower the champion's average time to less than 55 seconds, What kind of error have they made? Explain the impact to the company of such an error. O A. They have made a Type ll error and will lose the potential profit from selling the wax. B. They have made a Type I error and customers might demand their money back. O C. They have made a Type Il error and customers might demand their money back. O D. They have made a Type I error and will lose the potential profit from sellingthewax.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started