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Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first
a. Percentage of scores less than 100b. Relative frequency of scores less than 120c. Percentage of scores less than 140d. Percentage of scores less than 80e. Relative frequency of scores less than 60f. Percentage of scores greater than 120
The length of pregnancies are normally distributed with a mean of 268 days and standard deviation of 15 days. How many days do 80 percent of women last until in their birthing process?
Four hundred people apply for three jobs. 110 of the applicants are women. (a) If three persons are selected at random, what is the probability that all are women?
Identify the sample and population. Also, determine whether the sample is likely to be representative of the population.
Formulate a linear programming model that can be used to determine the number of units each model that should be produced in order to maximize the total contribution to profit
In a sample of 32 DVD players, what is the probability the average life will be less than 8 years (96 months)? (please round your answer to 4 decimal places).
Do these data provide sufficient evidence to reject the claim made by Creative Good? Two sample F-test for the ratio of population variances
Using data table given below, find out the range and median?
Find the expected value or average profit per customer and determine how much profit they should expect if 10 people purchase one of their European vacation packages.
Plot the control limits for the mean outside diameter and the range.
Find the moment generating function of their sum and identify the corresponding distribution, its mean and its variance.
Develop a model for determining how many people should be sent to contain the fire and for determining the best location for the firebreak.
We will randomly select 100 bags of cookies and weigh the contents of each bag selected. The probability that the sample mean will be between 14.9 and 15.1 ounces is?
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