Question: 1. A process for manufacturing cool drinks produces normally distributed yield with a mean of 600 a standard deviation of 100 units. A new

1. A process for manufacturing cool drinks produces normally distributed yield with

1. A process for manufacturing cool drinks produces normally distributed yield with a mean of 600 a standard deviation of 100 units. A new modified process yields an average of 630 units for a sample of size 64. At = 0.05, does modified yield process increase the yield? In a semester, the average quiz score in a course was 7. The teacher thought that the average would be less than 7 in that semester. A sample of size of 5 students gave scores: 6, 5, 7, 6, 8. Test his claim at = 0.05, assuming the sample is normally distributed.

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