College professor claims that those entering college this year appear to be smarter than the entering class from previous years, Tested random sample of 10 students entering finding their mean IQ of 113 with a standard deviation of 14. College records indicate that the mean IQ from previous years was 112. If we assume the IQ of this years class is normally distributed I there enough evidence to conclude at 0.1 level of significance the mean IQ of this years class is greater than previous years?
Use one tailed test.
Null hypothesis?
Alternative hypothesis?
Type of test statistic? Z t chi square or F?
Value of test statistic? round to 3 decimal places.
Critical value at 0.1 level of significance? round to 3 decimal places
Can we conclude at 0.1 level of significance that the mean IQ of this years class is greater than previous?