Normal Distribution, Z-Score

Normal Distribution, Z-Score

10th Grade

20 Qs

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Normal Distribution, Z-Score

Normal Distribution, Z-Score

Assessment

Quiz

Mathematics

10th Grade

Practice Problem

Medium

Created by

Anthony Clark

Used 1+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 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?

68%

34%

16%

2.5%

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

2.5

-2.5

5.2

-5.2

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

This data is normally distributed.  What percent of the data is in the shaded region?

68%

95%

99.7%

50%

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Adam's Z-score on a test is +2.50. What does this mean?

Adam's score has a 2.5% chance of being better than any other randomly selected score.

Adam's test score was better than 25% of his peers.

He scored 2.5 standard deviations above the average.

He did terrible.

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The # of standard deviations an observation falls from the center of a Normal distribution.

Z-score

t-score

Standard Error

Percentile

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a normal distribution, the z-score for the mean is 0.

True

False

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The weights of laboratory cockroaches follow a Normal distribution with mean 80 grams and standard deviation 2 grams. The following figure is the Normal curve for this distribution of weights.
Point C on this Normal curve corresponds to

84 grams.

82 grams.

78 grams.

76 grams.

74 grams.

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