11 Answered Questions for the topic Empirical Rule

Empirical Rule Statistics College

02/28/21

College Statistics

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 52 ounces and a standard deviation of 7 ounces.Use the 68-95-99.7 rule... more
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Empirical Rule Statistics

02/08/21

What is the percentages of time will the elevator arrive in more than 8 seconds and
Suppose that arrival times for an elevator in a large hotel are bell-shaped with a mean of 20 seconds and a standard deviation of 6 seconds.Please help I don't understand this question(d) What... more
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Empirical Rule Probability

05/08/19

approximately normally distributed with a mean of 500 and a standard deviation of 100. Using the empirical rule, what is the probability that a randomly selected score lies between 500 and 700?

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Empirical Rule Statistics Probability

04/26/19

Use the Empirircal Rule to answer this question
Women in a survey spend an average of $246 per year on beauty supplies. If the distribution of women's spending is normally distributed and the standard deviation is $30. What percent spend less... more
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Empirical Rule

09/24/18

Assume that a normal distribution of data has a mean of 12 and a standard deviation of 2. Find the percentage of values that lie below 14.
The answer I got is 83.5% but the book says that is incorrect. I am not sure what I am doing wrong or what I need to do to find the correct percentage. My scale for standard deviation is 68%-95%-99.7% more
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02/23/18

a mean of 444 and a standard deviation of 52 what percentage of students scored between 288 and 600 on the exam?
this problem includes z charts and finding the percentage
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Empirical Rule

02/09/16

Empirical Rule
Approximately what percent of the values in a sample are within (plus or minus) 2 standard deviations of the mean using the empirical rule?
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Empirical Rule

10/11/15

Percentage of 10th grade boys
Suppose that the mean height of 10th grade boys is 69 inches with a standard deviation of 2 inches and that it follows a Normal distribution. Using the empirical rule, determine the percentage of... more
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Empirical Rule

10/06/15

Empirical Rule
suppose the weights of eggs are normally distributed with a mean of 55 grams and standard deviation of 9 grams. According to the empirical rule, for the middle 95% of all eggs we would expect the... more
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Empirical Rule Statistics Question

10/18/13

Empirical Rule: Mean is 84 with a standard deviation of 7. Approximately how much is between 63 and 98?
I would like to know how to go about getting the answer to these questions.     1. Empirical Rule: Mean is 84 with a standard deviation of 7. Approximately how much is between 63 and... more
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Empirical Rule

10/03/13

How much do the middle 68% of customers purchase?
The normal distribution is set up with empirical rule. Mean: $55 Standard deviation: $18
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