In order to find the median, the data must be sorted from least to greatest first.
True
False
7. Multiple Choice
2 minutes
1 pt
Find the mean of these numbers: 5,11,2,12,4,2
4.1
6
4.5
4
8. Multiple Choice
2 minutes
1 pt
what is the outlier
the data value that is higher than or lower than data values in the set
the lier of the group
the outter edge
the otter of the group
9. Multiple Choice
5 minutes
1 pt
33, 25, 42, 25, 31, 37, 46, 29, 38 What is the third quartile of the data?
37
38
40
46
10. Multiple Choice
2 minutes
1 pt
What percentage of the data is between 40 and 90?
25 %
50%
75%
100%
11. Multiple Choice
2 minutes
1 pt
What percentage of the data is between 40 and 150?
25 %
50%
75%
100%
12. Multiple Choice
1 minute
1 pt
Can there be more than one outlier?
Yes
no
13. Multiple Choice
5 minutes
1 pt
What is the outlier in the following data set? 100,98,88,92,150,105, 85,115
115
150
88
14. Multiple Choice
15 minutes
1 pt
The mean life of a tire is 30,000 km. The standard deviation is 2000 km.
Then, 68% of all tires will have a life between ___________ km and __________ km.
28,000 km and 32,000 km.
24,000 km and 34,000 km.
26,000 km and 34,000 km.
27,000 km and 31,000 km.
15. Multiple Choice
15 minutes
1 pt
The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.
About what percent of the products last between 12 and 15 days?
68%
34%
16%
2.5%
16. Multiple Choice
15 minutes
1 pt
The Floppy Disk Company makes 3.5 inch floppy disks for disk drives that are 3.7 inches wide. The size of a manufactures disk is normally distributed with a standard deviation of 0.1 inches. The company manufactures 1000 disks every hour.
In one hour, how many disks would you expect to be between 3.4 inches and 3.7 inches?
819 disks
23 disks
500 disks
0 disks
17. Multiple Choice
5 minutes
1 pt
A fifth grader takes a standardized achievement test (mean = 125, standard deviation = 15) and scores a 148. What is the fifth graders standardized score?
2.2
2.75
139.67
1.53
18. Multiple Choice
2 minutes
1 pt
What shape is a normal distribution curve?
Half curve
Round curve
Bell curve
Square curve
19. Multiple Choice
5 minutes
1 pt
If the shaded area under the curve is .85, what is the other missing portion of the curve?