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A research concludes that the number of hours of exercise per week for adults is normally distributed with a mean of 3.5 hours and a standard deviation of 3 hours.
(a) Find the 75th percentile for the distribution of exercise time per week.
(b) What is the probability that a randomly selected adult has more than 5 hours of exercise per week?
The thickness of a flange on an aircraft component is uniformly distributed between 0.95 and 1.05 millimeters. Determine the cumulative distribution function of flange thickness.
Assume that stock is currently selling for $100. The change in the stock's price throughout the nest year follows a normal random variable with a mean of $10 and a standard deviation of $20.
Below is a partial multiple regression computer output based on a quadratic regression model to predict student enrollment at a local university.
In 2001, an estimated 78% of executives believed that age bias was a serious problem. In a 2004, 82% of the executives surveyed considered age bias a serious problem.
Which type of correlation procedure would be most appropriate to gauge the relationship between each pair of variables and do you expect each pair of variables to be significantly correlated or not?
A clothing factory needs to determine whether a new machine was producing a breaking strength of 70 pounds and standard deviation of 3.5 pounds. A sample of 36 pieces revealed a sample mean of 69.7 pounds. Is there evidence that the machine is not..
a suppose there are two people in a room. what is the probability that they have the same birthday? hint find the
a. Assuming that s1 = 1.2 and s2 = 1.1, test the relevant hypotheses using a = .001. b. Compute b for the test conducted in part (a) when m1 - m2 = 6.
A fashion student was interested in factors that predicted the salaries of catwalk models. She collected data from 231 models.
Mrs. Ming invested an amount of money in two accounts for one year. She invested some at 8% interest and the rest at 6% interest. Her total amount invested was $1500.
Create Gantt chart using MSP. Suppose the 5 day workweek, compute critical path of the project.
What is the best predicted IQ of the younger child, given that the older child has an IQ of 110? Use a significance level of 0.05.
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