
InvNorm
Authored by Deana Marshall
Other
11th Grade
CCSS covered
Used 4+ times

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16 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
In a survey of men in the United States (ages 20-29), the mean height was 69.6 inches with a standard deviation of 3.0 inches. Find the minimum height in the top 22%.
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The scoring of modern IQ is such that Intelligence Quotients (IQs) have a normal distribution of μ= 100 and 𝞂 = 15.
Mensa International is a non-profit organization that accepts only people with IQ score within the top 2%. What level of IQ qualifies one to be a member of Mensa?
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The distances male long jumpers for State College jump are approximately normal with a mean of 263 inches and a standard deviation of 14 inches.
Suppose a male long jumper's jump ranked in the 75th percentile. How long was his jump?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A 12 oz. can of soda has a mean volume of 12 oz, with a standard deviation of 0.25 oz. Find the z-score for the 90th percentile. How many ounces would the can have to fall at the 90th percentile?
z= 1.28, 13 ounces and above
z= 1.28, 12.32 ounces and above
z= 1.28. 0.9 ounces and above
z= -1/28, 12.32 ounces
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
At a local high school, GPAs are normally distributed with a mean of 2.9 and standard deviation of 0.6. What is the z-score for the 80th percentile? What GPA falls at the 80th percentile?
z= -0.84, A GPA of 3.40
z= -0,84, A GPA of 0.8
z= 0.84, A GPA of 3.80
z= 0.84, A GPA of 3.40
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
At a high school, GPAs are normally distributed with a mean of 2.9 and standard deviation of 0.6. What GPA do you need to fall in the top 20%? The top 10%?
3.40 and 3.67
3.67 and 3.40
3.80 and 3.90
3.20 and 3.10
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The mean life of a tire is 30,000 km. The standard deviation is 2000 km. The company will give you a refund for your tires if they fall in the lowest 5%. How many miles would get you a refund? What is the number of miles that would fall in the top 5%
26,700 km and 33,280 km
5,000 km and 25,000 km
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