WorksheetsStatistics Quizizz
Total questions: 23
Worksheet time: 26mins
Find the mean of these numbers:
5, 11, 2, 12, 4, 2
4.1
6
4.5
4
158cm 172cm 164cm
164cm 167cm 159cm
What is the range of the heights?
Find the z-score for 75 given a mean of 60 and a standard deviation of 6.
-2.5
2.5
-1.15
1.15
Find the z-score for 258 given a mean of 273 and a standard deviation of 5.
3
-2
2
-3
Find the area under the standard normal curve that lies to the left of z=2.1.
1.79%
-1.79%
98.21%
0.98%
Find the area under the standard normal curve that lies to the right of z=-0.67.
63.42%
74.86%
25.14%
50%
Find the area under the standard normal curve that lies between z=-0.5 and z=1.5.
62.46%
72.47%
5.40%
62.47%
Find the z-score with 20% of observations falling above it.
z=-0.84
z=1.84
z=-1.84
z=0.84
IQ tests have a mean of 100 and SD of 16. Einstein's IQ was 160. What is the z-score of his IQ?
1.75
3.75
0.75
2.75
A 5th grader takes a test (mean=125, SD=15) and scores a 148. What is the child's percentile rank?
93%
68%
7%
99.7%
Then, 68% of all tires will have a life between ___________ km and __________ km.
Given a mean of 75 and a standard deviation of 7, how many students out of 500 would score higher than 68?
11
12
420
250
About what percent of the products last between 12 and 15 days?
If I tell you that you scored at the 55th percentile on your final exam, you would know:
55% of the class scored the same or worse than you did
You earned a 55% on the exam
You failed the exam
45% of the class scored worse than you did
