Homework: Chapter 17.2 & 20 Assignment Save Score: 0.33 of 1 pt ( 8 of 8 (8 comp

Question

Homework: Chapter 17.2 & 20 Assignment Save Score: 0.33 of 1 pt ( 8 of 8 (8 complete) v > HW Score: 91.67%, 7.33 of 8 pts %) Instructor-created question EQuestion Help O 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. The champion's times (selected at random) are 56.5, 61.2, 48.8, 54.8, 49.9, 46.1, 54.5, and 41.3 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. Choose the correct null and alternative hypotheses below. untains Beyond untai.s - Part 2 OA. Hon = 55 OB. Hou 55 Han= 55 OC. Hou> 55 OD. Ho-p=55 Hap=55 HA

Explanation / Answer

The statistical software output for this problem is:

One sample T hypothesis test:
: Mean of variable
H0 : = 55
HA : < 55

Hypothesis test results:

Hence,

Hypotheses: Option D is correct.

t = -1.499

Since p - value is greater than 0.05, we do not reject Ho. Hence,

Conclusion: Option D is correct.

Variable Sample Mean Std. Err. DF T-Stat P-value Data 51.6375 2.2435572 7 -1.498736 0.0888

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