1. Quantitative Methods PSY302 Quiz Normal Curve Review February 6, 2017

2. 1. ____ means the data are not symmetrical.
quantitative
low variability
high variability
density
skewed

3. 1. ____ means the data are not symmetrical.
quantitative
low variability
high variability
density
skewed

4. 2. This symbol represents: σ
the sample mean
parameter
the population mean
statistic
all of the above

5. 2. This symbol represents: σ
the sample mean
parameter
the population mean
statistic
all of the above

6. 3. Attendance at a university’s basketball games follows a normal distribution with mean  = 8,000 and standard deviation  = 1,000. Estimate the percentage of games that have between 7,000 to 9,000 people in attendance.
68%
95%
99.7%

7. 3. Attendance at a university’s basketball games follows a normal distribution with mean  = 8,000 and standard deviation  = 1,000. Estimate the percentage of games that have between 7,000 to 9,000 people in attendance.
68%
95%
99.7%

8. 4. What percent of scores fall below a Z score of -.97?
28.4%
97%
87.6%
16.6%
50.1%

9. 4. What percent of scores fall below a Z score of -.97?
28.4%
97%
87.6%
16.6%
50.1%

10. 5. SAT mean=1020, SD=207 What percent score less than 720
5. SAT mean=1020, SD=207 What percent score less than 720? What is the Z-score?
.72
-1.45
-1.0
-3.5

11. 5. SAT mean=1020, SD=207 What percent score less than 720
5. SAT mean=1020, SD=207 What percent score less than 720? What is the Z-score?
.72
-1.45
-1.0
-3.5

12. 6. What percent of scores fall below a Z score of 1.28?
.8997
89.9%
56%
28%
A & B are correct

13. 6. What percent of scores fall below a Z score of 1.28?
.8997
89.9%
56%
28%
A & B are correct

14. 7. What percent of scores lie within 3 standard deviations of the mean?68 95
99.7
Can’t say

15. 7. What percent of scores lie within 3 standard deviations of the mean?68 95
99.7
Can’t say

16. 8. Calculating _____ requires measurement data.
a proportion
the mean
the mode
percent
rank

17. 8. Calculating _____ requires measurement data.
a proportion
the mean
the mode
percent
rank

18. 9. Assuming a mean of 150. 4 and a standard deviation of 8
9. Assuming a mean of and a standard deviation of 8.44, what is the z score for a raw score of 147?
-2.2
-.42
.89
1.47

19. 9. Assuming a mean of 150. 4 and a standard deviation of 8
9. Assuming a mean of and a standard deviation of 8.44, what is the z score for a raw score of 147?
-2.2
-.42
.89
1.47

20. 10. To describe a normal distribution you need the. (p. 64)
median and range
standard deviation and variance
mean and standard deviation
Z score and range
standard score and deviation score

21. 10. To describe a normal distribution you need the. (p. 64)
median and range
standard deviation and variance
mean and standard deviation
Z score and range
standard score and deviation score

22. Bonus: Which group has the higher standard deviation for height?
Alpha
Beta
Both are the same
Can’t say
Alpha
Beta

23. Bonus: Which group has the higher standard deviation for height?
Alpha
Beta
Both are the same
Can’t say
Alpha
Beta

24. The End