Match the following scenarios to the appropriate t-test:

A. independent samples t-test

B. single sample t-test

C. dependent-samples t-test

 

42.  ________ a comparison of the SAT scores of a group of 10 students who completed a special SAT preparation course compared to the scores of students in general on the SAT

 

43.  ________ a comparison of the scores of 13 randomly selected musicians on a melody identification test compared with 14 randomly selected non-musicians.

 

44. ________ a comparison of 15 participants' scores on a depression test before and after attending a therapy session.

 

45. SM2 stands for the  ____________________________.

 

46. The standard deviation is the square root of the _________________.

 

47. You are evaluating a non-directional hypothesis at the .05 significance level using a t test for a single sample. If there are 25 people in the sample, the cutoff score(s) needed is/are ____________.

 

Thirty randomly selected students took the calculus final. If the sample mean was 95 and the standard deviation was 6.6, construct a 99% confidence interval for the mean score of all students.

Suppose scores on an IQ test are normally distributed and suppose 20 people are randomly selected and tested. The standard deviation of the population is 15. What is the 90% confidence interval for the average test score in the sample group will be 110?

At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 79 and a standard deviation of 15. The scores on the calculus final are also approximately normally distributed, with a mean of 79 and a standard deviation of 12. A student scored 80 on the chemistry final and 82 on the calculus final. Relative to the students in each respective class, in which subject did the student do better?

a) There is no basis for comparison

b) The student did equally well in each course

c) Calculus

d) Chemistry

e) None of the above