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 57.3,63.1, 46.1, 50.4,46.4, 47.2, 53.1, and 42.3 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. Use 0.05 as the P-value cutoff level.
t= ___
p-value=___
A company is developing a new high performance wax for cross country ski racing. In order...
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 57.6, 61.4, 45.8, 53.4, 45.3, 45.1, 54.8, and 40.5 seconds to complete...
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 5555 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 50.450.4, 65.965.9, 49.549.5, 50.950.9, 48.248.2, 48.548.5, 53.853.8, and 43.543.5 seconds to complete...
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 are 55.7, 60.5, 50.8, 54.5, 49.2, 47.1, 51.1, and 42.9 seconds to complete the test course. Complete...
A professional skier was trying to decide whether to use a new racing wax for cross-country skis. He decided that the wax would be worth the price if he could average less than 55 seconds on a course he knew well, so he planned to test the wax by racing on the course 8 times. His sample of race times found a mean of 53.1 seconds, and standard deviation 7.0 seconds. Is this sufficient evidence he should he buy the...