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WorksheetsChapter 6 Review
Total questions: 10
Worksheet time: 13mins
A z-score of 3 means that a score...
Is 3 deviations below the mean
Is 3 deviations above the mean
Has a mean of 3
Has a median of 3
The average height of a Coal City student is 52 inches with a standard deviation of 3 inches. What is the z-score of a student who is 48 inches tall?
-2
-1.33
1.15
1.33
The average grade on Mr.Smiths test was a 65 with a standard deviation of 6. If Juzimar had a z-score of of 4, what was his grade on the test?
74
52
89
100
IQ test scores follow a normal distribution model with a mean of 110 and a standard deviation of 10. What percent of people have an IQ under 110?
25%
34%
16%
50%
IQ test scores follow a normal distribution model with a mean of 110 and a standard deviation of 10. What percent of people have an IQ between 110 and 130?
47.5%
2.35%
49.85%
68%
Using a normal distribution model, what percent of people would fall between a z-score of -1 and 1?
67%
68%
50%
34%
On a normal distribution graph, find the Z-score for the lowest 8%
-2.3
-1.41
-1.2
-1.49
Find the Z-scores for the middle 40%
-0.75, 0.75
-1.2, 1.2
-0.45, 0.45
-0.52, 0.52
The mean life-span of a hamster is 20,000 years. The standard deviation is 1,500 years. 95% of all hamsters will live between ______ and ______ years.
18,500 years and 21,500 years
17,000 years and 23,000 years
13,000 years and 15,000 years
2 years and 4 years
Kastriot can cross anyone up that dares to defend him in basketball. He can usually drop his defender in 1 second with a standard deviation of 0.5 seconds. What percentage of people will have broken ankles in under 2.3 seconds?
95.3%
90.22%
99.53%
85.89%
