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Mathematics
9th -
12thgrade
Standard normal (z) distribution skills check
6 questions
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- 1. Multiple ChoiceIf heights of 3rd graders follow a normal distribution with a mean of 52 inches and a standard deviation of 2.5 inches, what is the z score of a 3rd grader who is 47 inches tall?-5-225
- 2. 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 - 3. Multiple ChoiceThe mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees. What is the z-score for a temperature of 17 degrees?11.43-1.4311.5
- 4. Multiple Choice
The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees. Approximately what percent of days in February will have days below 21 degrees? Choose the closest answer.
31.7%
34%
50%
68%
- 5. Multiple Choice
The 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 10 and 16 days?
90.88%
25.25%
65.63%
2.5%
- 6. Multiple Choice
The 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 8 days or more?
68%
34%
9.12%
90.88%
- Answer choicesTagsAnswer choicesTags