10. a. Perform a one-sample t-test with the following scores: Population mean = 15.8, M=20 and the SEM=8.6. b. Consult the t table to obtain a critical value for the outcome using an alpha level of a=.05, for a two tailed test and with a degree of freedom of df= 7. c. Draw the curve and shade the critical regions. Is the t value you calculated statistically significant? Do you reject the null? Is there a difference between the sample and the population