Eighteen Autism Spectrum Disordered clients were assessed on cognitive andbehavioraltasks. The group'saverage score was 17.59, with SS= 507.37. If the population mean () for this tasks is 20.50, was the group's task performance significantly different from the population?

A) What type of t-test should you use? Is it one-tailed or two-tailed? (2 pts)

B) State the hypotheses first in mathematical terms and then in a sentence. (4 pts)

C) Show the degrees of freedom, and the critical t value for this test. (2 pts)

D) Analyze the data using the proper t-test. (6 pts)

E) State whether or not to reject the null, and write a sentence, using APA style, describing your conclusion using the variables in the study. (3 pts)