13 Answered Questions for the topic Z-Scores

Z Scores Statistics

06/01/21

A normal distribution of scores has a variance of S2=100. Find the z-scores corresponding to each of the following values
A normal distribution of scores has a variance of S2=100. Find the z-scores corresponding to each of the following values: a.     A score that is 20 points above the mean.b.     A score that is 10... more
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Z Scores Statistics

05/06/19

The area between z=0.72 and z=1.24
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07/10/18

Standard deviation and z-scores
Assume that the salaries of elementary teachers in the United States are approximately normally distributed with a mean of $32,000 and a standard deviation of $6,000. What is the approximate... more
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Z Scores Statistics

10/22/17

With a topic of z-scores, Which score indicates the highest relative position?
A) A score of 3.2 on a test with mean=4.6 and s=1.5 B) A score of 630 on a test with mean=800 and s=200 C) A score of 43 on a test with mean=50 and s=5 D) A score of 16 on a test with mean=18... more
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10/07/17

Normally distributed with a mean of 587 and a standard deviation of 98. what percentage of scores are at least 600?
I need all work possible. 
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06/01/17

Standard deviation
A tile company produces floor tiles that has an average thickness of 55mm, with a standard deviation of 0.6mm. For premium quality floors, the tiles must have a thickness between 54mm and 55mm.... more
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Z Scores

11/03/16

You want to know the percentage of financial services companies that earned revenue between 36 36 million and 84 84 million dollars
This problem has to do with Z-scores.    You want to know the percentage of financial services companies that earned revenue between 3636 million and 8484 million dollars. If the mean revenue was... more
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10/17/16

Find the z-score
Suppose 12 people are asked to rate themselves in terms of their accumulated wisdom. The first 11 people, being humble, give themselves a zero. The 12th person--with gigantic arrogance--responds by... more
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02/20/16

The edible portion of grape clusters
The edible portion of grape clusters from a Mexican farm were measured to have a mean weight of 429.5 g and a standard deviation of 42.8 g. For selling purposes, the clusters are divided into two... more
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Z Scores

10/12/15

What z scores separate the middle 60% of the scores from the outer 40% of the scores?
z = -.25 and .25 z = -.84 and .84 z = -1.0 and 1.0 None of the above.
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04/23/15

in a standard normal distributuion, above which z-score do approximately 57% of the data lie?
in a standard normal distribution, above which z-score do approximately 57% of the data lie?
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Z Scores Statistics

03/20/13

How to find z-scores?
How can I find the z-scores of 0.7491, 0.0931, and 0.3452?
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01/03/13

In a standard normal model, what value of z cuts off the lowest 12%?
Need to draw a picture first.
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