Answer Happy

A somewhat outdated study indicates that the mean number of hours worked per week by software developers is 44. We have good reason to suspect that the mean number of hours worked per week by software developers, is now different from 14 and wish to do a statistical test. We select a random sample or software developers and find that the mean of the sample is 47 hours and that the standard deviation is 3 hours Based on this information, complete the parts below (a) what are the null pothesis and the alternative hypothesis that should be used for the test? M X 00 DO 2 DOO x ? (b) Suppose that we decide to reject the null hypothesis. What sort of error might we be making? (Choose one) (C) Suppose the true mean number of hours worked by software engineers is 44 hours, Fill in the blanks to describe a Type I error A Type 1 error would be (Choose one) the hypothesis that is (choose one) (Choose one) when, in fact, it is (Choose one),