11 Answered Questions for the topic Z-Scores
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
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
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.
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
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
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
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
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?
In a standard normal model, what value of z cuts off the lowest 12%?
Need to draw a picture first.