A college professor claims that the entering class this year appears to be smarter than entering classes from previous
years. He tests a random sample of 16 of this year's entering students and finds that their mean 1Q score is 118, with
standard deviation of 11. The college records indicate that the mean IQ score for entering students from previous
years is 113 . If we assume that the IQ scores of this year's entering class are normally distributed, is there enough
evidence to conclude, at the 0.10 level of significance, that themean IQ score, u, of this year's class is greater than that
of previous years?
Perform a one - tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places and round your answers as specified in the table.
(If necessary, consult a list of formulas.)
(a) State the null hypothesis H, and the alternative hypothesis H, •
H :0
H,: