Quick Quiz 2 - kelly's math stuff
Quick Quiz 2
Use the frequency table to the right to answer questions 1-6
1. The modal class is:
a. 0-9
b. 40-49
c. 20-29
d. Can’t be determined
2. The class mark (midpoint) of the 3rd interval is:
a. 18
b. 20
c. 24.5
d. 29
3. The class boundaries of the 2nd class are:
a. 9.5, 18.5
b. 10.5, 19.5
c. 10.5, 18.5
d. 9.5, 19.5
4. The class width for the frequency table is:
a. 9
b. 10
c. 40
d. 49
5. The relative frequency for the 4th class is:
a. 0.10
b. 0.20
c. 0.50
d. Can’t be determined
6. The shape of this distribution is:
a. bell
b. uniform
c. skewed left
d. skewed right
Use the list at the right to answer questions 7-13
7. The mean for this data is:
a. 27.5
b. 28.2
c. 28.5
d. 31
8. The median for this data is:
a. 27.5
b. 28.2
c. 28.5
d. 31
9. The mode for this data is:
a. 27.5
b. 28.2
c. 28.5
d. 31
10. The midrange for this data is:
a. 27.5
b. 28.2
c. 28.5
d. 31
Answers:
1. c 2. c 3. d 4. b 5. b 6. a 7. b 8. c 9. d 10. a
-----------------------
Interval f
0-9 5
10-19 11
20-29 18
30-39 10
40-49 6
23, 29, 31, 31, 28, 26, 32, 27, 24, 31
................
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