1. Quantitative Methods PSY302 Quiz Normal Curve Review February 7, 2018

2. 1. For these data the mean is 500 and the standard deviation is:
600
34%
Can’t say
400 16
100

3. 1. For these data the mean is 500 and the standard deviation is:
600
34%
Can’t say
400 16
100

4. 2. In 2002 the scores of men on the math SAT had a mean of 534 and standard deviation of 116. Bob scored 750. What is the z-score for 750?
-1.25
1.86
2.27
-.25

5. 2. In 2002 the scores of men on the math SAT had a mean of 534 and standard deviation of 116. Bob scored 750. What is the z-score for 750?
-1.25
1.86
2.27
-.25

6. 3. The _______ of an event in the population equals the probability of the event.
relative frequency
Standard error of the mean
Variance
Importance or relevance
All of the above

7. 3. The _______ of an event in the population equals the probability of the event.
relative frequency
Standard error of the mean
Variance
Importance or relevance
All of the above

8. 4. Which of the following is positively skewed?

9. 4. Which of the following is positively skewed?

10. 5. Which curve below has the larger standard deviation?

11. 5. Which curve below has the larger standard deviation?

12. 6. The values that the statistic can take and the relative frequency of each is called:
The sum of squares
Implicit association
A sampling distribution
Chi square
All of the above

13. 6. The values that the statistic can take and the relative frequency of each is called:
The sum of squares
Implicit association
A sampling distribution
Chi square
All of the above

14. 7. The WAIS IQ test has a mean of 100 and a standard deviation of 15
7. The WAIS IQ test has a mean of 100 and a standard deviation of 15. What percent of people score below 100 on this IQ test?
1. 100%
2. 75%
3. 50%
4. 25% %

15. 7. The WAIS IQ test has a mean of 100 and a standard deviation of 15
7. The WAIS IQ test has a mean of 100 and a standard deviation of 15. What percent of people score below 100 on this IQ test?
1. 100%
2. 75%
3. 50%
4. 25% %

16. 8. To describe a normal distribution you need the ____ and the standard deviation.
1. hypotenuse
2. skewness
3. standard score
4. mean
5. Z score

17. 8. To describe a normal distribution you need the ____ and the standard deviation.
1. hypotenuse
2. skewness
3. standard score
4. mean
5. Z score

18. 9. The mean score on the WAIS IQ scale is 100 with a standard deviation of 15. Someone who got a score of 90 would have a z-score of:
1.96
.75
.68
-1.2
-.67

19. 9. The mean score on the WAIS IQ scale is 100 with a standard deviation of 15. Someone who got a score of 90 would have a z-score of:
1.96
.75
.68
-1.2
-.67

20. 10. What percentage of scores lie within two standard deviations of the mean?0%
50%
68%
95%
103%

21. 10. What percentage of scores lie within two standard deviations of the mean?0%
50%
68%
95%
103%

22. Bonus Question: What percent of scores lie below a Z-score of +1?
40%
50%
84%
95%
100%

23. Bonus Question: What percent of scores lie below a Z-score of +1?
40%
50%
84%
95%
100%

24. The End

25. C B D A E