Question 8 What is the main difference between a Z score and a t score? t scores
ID: 3256869 • Letter: Q
Question
Question 8
What is the main difference between a Z score and a t score?
t scores are used for one-tail tests and Z scores are used for two-tailed tests.
t scores are used when the population variance is unknown
t scores are used for sample sizes greater than 100
t scores are used for variance estimates that are greater than 100
2 points
Question 9
Which of the following is an assumption of the t-test?
The sample is skewed
The population distribution is skewed
The population distribution is normal
The variance of the distribution of individuals equals the variance of the comparison distribution
2 points
Question 10
Which of the studies below would be analyzed using a t-test for dependent means
The study of the effectiveness of a new medication given to the same subjects at two points in time
A study comparing men and women on a test of motor function
A study comparing the mean of a sample of students on a test of motor function to a known population mean and variance
A study examining the ideal dosage for a new medication
2 points
Question 11
You have been assigned to examine the salary compensation policies of a business. You decided to examine the relationship between the average Beginning Salary of the workers to their average Currect Salary. Which type of t-test would you use?
T-test for dependent means, also called a paired means t-test
T-test for independent means
T-test for separate means
T-Test for random means
a.t scores are used for one-tail tests and Z scores are used for two-tailed tests.
b.t scores are used when the population variance is unknown
c.t scores are used for sample sizes greater than 100
d.t scores are used for variance estimates that are greater than 100
Explanation / Answer
Solution:-
Q.8 (b) T-score are used when the population variance is unknown.
Q.9 (c) The population distribution is normal.
Q.10 (a) The study of the effectiveness of a new medication given to the same subject at two points in time.
Q.11 (a) T-test for dependent means .also called paired means T-test.
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