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Assume we interested in relationship between the age of individual, as measured by visits. Suppose after selecting 15 members the observation:
Visits: 3 5 4 2 1 3 6 7 4 5 10 1 2 3 8Age: 28 45 50 19 16 27 54 63 32 42 68 19 23 30 61
Use this data to find the Covariance between age and the number of visits.
Assume that the length X in minutes of a regular season NBA game is normally Distributed with X~N (µ X , σ 2 X );
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
There are 5,000,000 Adults 25+ in Mtown. An advertiser buys a schedule on Channel 45: 20 spots in early news with an average A25+ quarter hour audience of 150,000, 25 spots in daytime with an average A25+ quarter hour audience of 200,000, and 10 s..
You wish to find out if negative relationship exists between amount of bottled water someone drinks and their water bill. Create a prediction model, if suitable.
The data below show the average daily high temperature for Chicago, Illinois, for twelve recent spring and summer months. Create a stem-and -leaf diagram for the data.
Given the following data, 1) how do you make Excel create a scatter diagram for you? 2) If you were to draw a line through the points, how straight would the line be?
What is the probability that a randomly selected automobile manufactured by the company will have a defective microprocessor?
Determine the distributions given below represent a probability distribution. Justify your answer.
f x has a normal distribution with mean µ=15 and standard deviation σ= 3, describe the distribution of x values for sample size n, where n = 4, n = 16, and n = 100. How do the x distributions compare for the various sample sizes?
An exam consists of 10 true or false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly six questions correctly? (Round the answer to three decimal places)
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that:
How can you or your department decide whether or not the variation is important? How could using a mean difference test help?
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