
Normal Model - convert to z-scores and finding probability
Authored by Erin Mellow
Mathematics
9th Grade
CCSS covered
Used 2+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The 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.
Tags
CCSS.HSS.ID.A.4
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
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 12 and 15 days?
Tags
CCSS.HSS.ID.A.4
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The z-score represents.....
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
If I have a positive z-score, I scored ABOVE or BELOW the mean?
ABOVE
BELOW
Tags
CCSS.HSS.ID.A.4
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds. What is the z-score for a player who runs a time of 5.6 seconds?
Tags
CCSS.HSS.ID.A.4
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5. What proportion of weeks would you expect to have less than 5 accidents?
Tags
CCSS.HSS.ID.A.4
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
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
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