Mean and Standard Deviation from Probability Distribution

Mean and Standard Deviation from Probability Distribution

12th Grade

20 Qs

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Mean and Standard Deviation from Probability Distribution

Mean and Standard Deviation from Probability Distribution

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Hard

Created by

Anthony Clark

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The amount of fuel used by jumbo jets to take off is normally distributed with a mean of 4000 gallons and a standard deviation of 125 gallons.  What is the probability that the mean number of gallons of fuel needed to take off for a randomly selected sample of 40 jumbo jets will be less than 3950 gallons?

.0057

.025

.345

.781

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Suppose the teenagers that attend public high schools get an average of 5.7 hours of sleep each night with a standard deviation of 1.7 hours.  What is the probability that a randomly selected group of 35 high school students get more than 6 hours of sleep each night?

.430

.148

.281

.087

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The mean and standard deviation of a population are 400 and 40, respectively. Sample size is 25. 
What is the mean of the sampling distribution?

400

40

25

8

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The mean and standard deviation of a population are 400 and 40, respectively. Sample size is 25. 
What is the standard error of the sampling distribution?

400

40

25

8

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Following is the probability distribution for the age of a student at a certain public high school.

Find the standard deviation of the probability distribution

1.52

1.26

1.87

1.71

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the mean and the standard deviation.

μ = .4; σ = 7.5

μ = 2.5; σ = 1.1

μ = 3; σ = 1.3

μ = .1; σ = 0

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

What does this symbol represent?

Median

Variance

Standard Deviation

Mean Absolute Deviation

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