11 Answered Questions for the topic Z-Scores

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...
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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...
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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.

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....
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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...
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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...
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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...
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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?

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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