z-score practice
Authored by Amanda Wilfinger
Mathematics
10th - 12th Grade
CCSS covered
Used 4+ times
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22 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If 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?
Tags
CCSS.HSS.ID.A.4
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
In a factory, the weight of the concrete poured into a mold by a machine follows a normal distribution with a mean of 1150 pounds and a standard deviation of 22 pounds. Approximately 95% of molds filled by this machine will hold weights in what interval?
Tags
CCSS.HSS.ID.A.4
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A national achievement test is administered annually to 3rd graders. The test has a mean score of 100 and a standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test?
Tags
CCSS.HSS.ID.A.4
CCSS.HSA.REI.B.3
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The 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.
Tags
CCSS.HSS.ID.A.4
5.
MULTIPLE CHOICE QUESTION
5 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
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The 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?
Tags
CCSS.HSS.ID.A.4
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
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 23 degrees?
Tags
CCSS.HSS.ID.A.4
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