Probability and Statistics Normal Distribution Practice

Probability and Statistics Normal Distribution Practice

12th Grade

10 Qs

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Probability and Statistics Normal Distribution Practice

Probability and Statistics Normal Distribution Practice

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Medium

Created by

Anthony Clark

Used 3+ times

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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 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?

0.6915

0.1762

0.8238

-0.93

2.

MULTIPLE CHOICE QUESTION

1 min • 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 more than 7 accidents?

0.3446

0.2856

0.4

0.6554

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Between what two standard deviations of a normal distribution contain 68% of the data?

one below and one above

two below and two above

two below and zero

zero and two above

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The average waist size for teenage males is 29 inches with a standard deviation of 1.4 inch. 
If waist sizes are normally distributed, estimate the proportion of teenagers who will have waist   sizes greater than 31 inches?

92.4%

10.5%

16%

7.6%

5.

MULTIPLE CHOICE QUESTION

1 min • 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?

115

130.75

145

120

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the the total area under the standard normal distribution curve?

100

25

.5

1

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

μ = 70 , σ = 8 , X = 50 . Find z score

2.5

-2.5

5.2

-5.2

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