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The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses fewer than 400 minutes?
a. 0
b. 0.023
c. 0.159
d. 0.977
e. none of the above
At a party there are 30 students over age 21 and 20 students under age 21. You choose at random 3 of those over 21 and separately choose at random 2 of those under 21 to int
Develop a simulation model to compare the net present value of buying or leasing the car for 24 months. To compare the two options a number of assumptions must be made. Assu
In the 1970s, computers (even minicomputers) were very expensive. Since no one had their own computer, people had to share. Compared to today, computers in the 1970s were sl
Senator Hayes is considering a a run for the U.S. presidency, but she is only 35 years of age, which is the minimum required age. While investigating this issue, she finds t
To revise an existing inventory system, a company needs to know something about the lead time for orders it places for a critical part. The company looks at the last 20 orde
Construct a stem-and leaf display for the data set? Construct a box plot for the data set? Draw conclusions about the data (e.g. are there any outliers, etc, etc.).
If the manager decides to spend $3000 on advertising, based on the simple linear regression results given above, what would the estimated sales be?
a. Suggest an appropriate dependent variable. b. Write a model for this experimental situation and identify all terms. c. Fill out the sources and degrees of freedom for an AO
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