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- 1. Multiple Choice
Given a mean of 75 and a standard deviation of 7, what percentage of scores are between 75 and 82?
68%
81.5%
16%
34%
- 2. Multiple Choice
The average weight of a newborn is 7.5 pounds, with a standard deviation of 1.25 pounds. Birth weight follows the standard normal curve. What percent of newborns weigh 5 pounds or less at birth?
2.35%
0.15%
2.5%
50%
- 3. Multiple ChoiceWhat shape is a normal distribution curve?Half curveRound curveBell curveSquare curve
- 4. Multiple ChoiceThe normal curve is symmetrical about the mean.TrueFalse
- 5. 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% - 6. Multiple Choice
According to the empirical rule, what percentage of data falls within 1 standard deviation of the mean?
25%
68%
95%
99.7%
- 7. Multiple Choice
According to the empirical rule, how much of the data falls within 2 standard deviations of the mean?
25%
68%
95%
99.7%
- 8. Multiple Choice
The area under the normal curve is 1.
True
False
- 9. Multiple Choice
If this is the graph of data normally distributed with a mean of 30 and a standard deviation of 5, what label (number) is written at the blue circle?
20
15
40
30
- 10. Multiple Choice
If this is the graph of data normally distributed with a mean of 30 and a standard deviation of 5, what label (number) is written at the blue circle?
40
35
45
50
- Answer choicesTagsAnswer choicesTags