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- 1. Multiple Choice
On a standardized test with a normal distribution, the mean is 20 and the standard deviation is 2.6. In which interval would the greatest number of scores occur?
17.4-20.0
12.2-14.8
22.6-25.2
27.8-30.4
- 2. Multiple ChoiceWhat is the median of this data set?
3 , 17 , 17 , 11 , 8 , 13 , 5 , 1811121317 - 3. Multiple Choice
On a standardized test, Phyllis scored 84, exactly one standard deviation above the mean. If the standard deviation for the test is 6, what is the mean score for the test?
90
78
87
81
- 4. Multiple ChoiceRoger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Roger's scores?1931276066
- 5. Multiple ChoiceWhat is the median?62586660
- 6. Multiple ChoiceWhat is the minimum value?64586661
- 7. Multiple ChoiceWhat is the maximum value?58666460
- 8. Multiple ChoiceHow many students received a score of 94%?94412
- 9. Multiple Choice
What type of graph is this?
Bar Graph
Histogram
Line Plot
Box and Whisker Plot
- 10. Multiple ChoiceWhich interval has the greatest number of employees?11-2133-4377-8744-54
- 11. Multiple Choice
Find the z-score.
Mean = 38
Standard Deviation: 1.2
x = 42
3.33
-3
3.03
-3.33
- 12. Multiple Choice
Find the z-score.
Mean = 45
Standard Deviation: 2.1
x = 50
2.38
3.00
3.08
2.33
- 13. Multiple Choice
Find the value of x.
Z-score = -2.2
mean = 25
Standard Deviation: 7
9.6
-36
5.2
23.46
- 14. Multiple Choice
Find the mean.
Z-score = -1.25
Standard Deviation: 4
x = 11
16
6
18
21
- 15. Multiple ChoiceThe 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. - 16. Multiple ChoiceThe average waist size for teenage males is 29 inches with a standard deviation of 2 inches.
If waist sizes are normally distributed, determine the z-score of a teenage male with a 33 inch waist.21-2-1 - 17. Multiple ChoiceWhat shape is a normal distribution curve?Half curveRound curveBell curveSquare curve
- 18. Multiple ChoiceThe 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% - 19. Multiple ChoiceThe z-score represents.....the amount of standard deviations a data value is above or below the mean.the percentile the data value is above or below the mean.the amount of standard deviations a data value is above or below the median.the percent the data value is above or below the mean.
- 20. Multiple Choice
What is the z-score for the mean?
-1
+1
0
It doesn't have one!
- 21. Multiple Choice
If I have a positive z-score, I scored ABOVE or BELOW the mean?
ABOVE
BELOW
- 22. Multiple Choice
Joanne's Z-score is -1.5. What does this mean?
She didn't take the test yet.
She scored 1.5 standard deviations below the average.
She did better than most people.
No clue
- 23. Multiple Choice
What will be the miles per gallon for a Toyota Camry when the average mpg is 23, it has a z value of 1.5 and a standard deviation of 2?
25 mpg
20 mpg
26 mpg
68 mpg
- 24. Multiple Choice
A group of data with normal distribution has a mean of 45. If one element of the data is 60, will the z-score be positive or negative?
Positive
Negative
Neither
- 25. Multiple Choice1. Which best describes the shaded part of this normal distribution graph?All data that is one or higher.All data that is one or more standard deviations above the mean.All data that is between 1 and 3.All data that is above the mean.
- 26. Multiple ChoiceThe normal curve is symmetrical about the mean.TrueFalse
- 27. Multiple ChoiceFind the area under the standard normal curve to the right of z = -2.67.0.08690.99620.00080.1234
- 28. Multiple ChoiceFind the area under the normal distribution curve between a z=-1.26 and z=.57.0.00470.92040.61190.4981
- 29. Multiple ChoiceFind the area under the normal distribution curve to the left of
Z=0.27.0.39360.38970.60640.4892 - 30. Multiple ChoiceFind the area under the normal distribution curve between
z=-1.53 and z=0.0.4370.5630.5000.063 - Answer choicesTagsAnswer choicesTags