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For many years TV executives used the guideline that 30 percent of the audience was 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, and 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 was viewing a cable station. At the .05 significance level, can we conclude that the guideline is still reasonable?
Which of the following measures only the strength of a relationship?
Write down the advantages and disadvantages of using computer software for decision making.
Between what two values does the P -value of this test fall?
A human factors psychologist studied three computer keyboard designs.
One measure of the overall sampling error in the entire distribution of sample means is the
Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time.
In exercise identify (a) sample and (b) population. Also, find whether sample is likely to be representative of population.
What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 5 of µ? Use the value 20 for the population standard deviation of scores on this subsection.
What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?
Find the area under the normal distribution curve to the right of z = -1.03.
Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group Perform the chi-square test for a uniform distribution at α = .01
What is the probability you pick a plum and Which of the following is a legitimate probability distribution for this situation
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