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Researchers found a correlation coefficient of r = .50 on personality measures for identical twins. A reporter interpreted this to mean "the environment orchestrated one-half of their personality differences."
Question: Do you agree with this interpretation? Discuss.
What is the probability that a worker at Random drives more that 15 miles to work if the distribution of all worker's mileage is a Normal Distribution that ranges from 4 miles to 26 miles?
Let x be a random variable that represents the commute time of teachers in a large urban area. If x is normally distributed with a mean of 46 minutes and a standard deviation of 5 minutes, find the commute time which is at the top of the bottom 25..
Find the mean and standard deviation for the number of left-handed students in such classes of 25 students.
suppose that prices of a certain model of new homes are normally distruted with a mean of 142000 and a standard
Determine the probability that a randomly selected teacher earns more than $525 per week?
If a member of the sales force submits an entertainment expense (dinner cost for four) of $190, should this expense be considered unusually high (and possibly worthy of investigation by the company)?
Formulate and test an appropriate set of hypotheses to determine if the machine can be qualified. Use a = 0.05. Find the P-value.
The following are quality control data for a manufacturing process at Kensport Chemical Company. The data show the temperature in degrees centigrade at five point in time during a manufacturing cycle.
Under what circumstances should a nonparametric test be used? Explain. What are the strengths and weaknesses of nonparametric tests?
Explain the difference between a discrete and a continuous random variable. Give two examples of each type of random variable.
let x and y be continuous random variables with the joint probability density functionfxy 6x if xgtor equals 0 ygt or
In a large section of a statistics class, the points for the final exam are normally distributed with a mean of 72 and a standard deviation of 9. Find the lowest score on the final exam that would qualify a student for an A, a B and a C.
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