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For many years TV executives used the guideline that 30 percent of the audiences were watching each of the prime-time networks and 10 percent were watching cable stations on a weekday night. A random sample of 500 viewers in the Tampa-St. Petersburg, Florida, area last Monday night showed that 165 homes were tuned in to the ABC affiliate, 140 to the CBS affiliate, 125 to the NBC affiliate, and the remainder were viewing a cable station.
At the .05 significance level, can we conclude that the guideline is still reasonable?
A confidence interval increases in width as:
Criterion of realism or Hurwitz. Assume that the payoff from an investment depends on market conditions. Illustrate what is the criterion of realism value.
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
A certain random experiment can result in one of four different possible outcomes, which we'll call A, B, C and D.
Describe the Linear programming problem with constraints. Which among the following is not acceptable as a constraint in a linear programming problem?
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
A manufacturer of billiard balls is testing three additives to the basic plastic. Show the partial ANOVA table
The sample size n , the sample means, and the sample standard deviations for the two groups are given below.
Probability based on normal distribution. Suppose among X has a normal distribution, and find the indicated probability.
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
The 99% confidence interval estimate for a population variance when a sample standard deviation of 12 is obtained from a sample of 10 items is:
At α = .05, is there a difference in variances? Illustrate all steps clearly, including the illustration of the decision rule.
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