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- 1. 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% - 2. 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 6 days or less?68%34%16%2.5% - 3. 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. - 4. Multiple Choice
1. 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.
- 5. Multiple ChoiceWhat shape is a normal distribution curve?Half curveRound curveBell curveSquare curve
- 6. Multiple Choice
Between what two standard deviations of a normal distribution contain 68% of the data?
one below and one above the mean
two below and two above the mean
two below the mean and zero
zero and two above the mean
- 7. Multiple ChoiceWhat does the mean tell you about a data setIt tells you the number that occurs the mostIt is the difference between the highest and lowest numberIt tells you the average of the data setIt tells you how mad someone is at another persom
- 8. Multiple ChoiceWhat is the Normal Range (68%) of the annual precipitation for Phoenix, if the average is 29 with a standard deviation of 3?26-323-2926-2939-32
- 9. Multiple ChoiceWhat is the Normal Range (68%) of the monthly salary of teachers if the average is $4,000.00 with a standard deviation of 3,000?1000-70003000-40001000-40004000-7000
- 10. Multiple ChoiceThe distribution of heights of adult American men is approximately Normal with mean 69 inches and standard deviation 2.5 inches. What percent of men are between 64 and 66.5 inches tall?50%2.5%13.5%34%
- 11. Multiple ChoiceThe distribution of heights of adult American men is approximately Normal with mean 69 inches and standard deviation 2.5 inches. Between what heights do the middle 95% of men fall?66.5-71.564-7461.5-76.565-73
- 12. Multiple Choice
The mean July daily rainfall in Hulu Kinta is 10 mm and the standard deviation is 1.5 mm
Assume that this data is normally distributed.
How many days in July would you expect the daily rainfall to be less than 8.5 mm?
5
6
7
10
- 13. Multiple Choice
68% of the marks in a test are between 51 and 64
Assuming this data is normally distributed, what are the mean and standard deviation?
Mean = 57
S.D. = 6.5
Mean = 57
S.D. = 7
Mean = 57.5
S.D. = 6.5
Mean = 57.5
S.D. = 13
- 14. Multiple Choice
A company makes parts for a machine. The lengths of the parts must be within certain limits or they will be rejected.
A large number of parts were measured and the mean and standard deviation were calculated as 3.1 m and 0.005 m respectively.
Assuming this data is normally distributed and 99.7% of the parts were accepted, what are the limits?
Between 3.075 m and 3.125 m
Between 3.080 m and 3.120 m
Between 3.085 m and 3.115 m
Between 3.090 m and 3.110 m
- 15. 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% - Answer choicesTagsAnswer choicesTags