WorksheetsS.U5 Test Review
Total questions: 20
Worksheet time: 1hrs 6mins
If the value we are looking for is smaller than the mean, the value of z is:
Not enough information
Negative
Positive
0
If the value we are looking for is the same as the mean, the value of z is:
Not enough information
Positive
Negative
0
What's the probability x > 17?
(Mean = 15, Standard dev = 3)
0.7486
0.7454
0.2514
0.2546
What's the probability of the gray area?
(Mean = 55, Standard dev = 2.5)
0.8185
0.8413
0.8641
0.8389
What's the probability of x < 13 ?
(Mean = 20, Standard dev = 6.5)
0.1423
0.1401
0.0446
0.0359
What's the probability of the highlighted area?
(Mean = 30, Variance = 1)
0.8664
0.7863
0.9332
0.8754
Suppose a male long jumper's jump ranked in the 75th percentile. How long was his jump?
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
In a survey of men in the United States (ages 20-29), the mean height was 69.6 inches with a standard deviation of 3.0 inches. Find the minimum height in the top 17.5% .
69.98 in
71.18 in
72.40 in
73.01 in
Then, 68% of all tires will have a life between ___________ km and __________ km.
A grading scale is set up for 1000 students’ test scores. It is assumed that the scores are normally distributed with a mean score of 75 and a standard deviation of 15. Calculate the score that lies -2 standard deviation from the mean.
60
475
45
9500
Find the z-score for 48 given a mean of 50 and a standard deviation of 5.
2.5
-2.5
-0.4
0.4
Based on the graph, who has the highest IQ?
You
Me
Both have the same
Not enough information
