T tests and Z tests

D Question 27 27. What is the z or t value? O -8.995 0 -0.876 O -21.436 O 1.002 O 1.609 D Question 28 28. Assuming a p level of 0.05, what do you conclude? since our calculated value exceeds the critical value, then we can reject the null hypothesis O since our calculated value does not exceed the critical value, then we can reject the null hypothesis since our calculated value exceeds the critical value, then we fail to reject the null hypothesis since our calculated value does not exceed the critical value; then we fail to reject the null hypothesisMs Cahill thinks that her 2002 senior class of 63 students is the best she has ever had. To test this she compares her students' SAT scores with the scores from the senior class from 1981. Until this class, she had thought that the 59 students from the class of 1981was the best she had ever had. Use the following data to answer questions 25-28. Here is the data she collected: 1981 2002 Mean 1040 1160 SD 57 88 0.13 25. What t test or z test should you use to analyze this data? O t test for correlated samples O t test for single samples O z test for single samples O t test for independent samples D Question 26 3 pts 26. What is the standard error value? 13.341 177.989 0 5.613 O 11.76 5.661