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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?
Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
We are establishing a quality control program for a process and need to establish the mean and standard deviation for the process. The first 10 batches had samples of size 5 taken.
Evaluate z statistic for the Wilcoxon rank sum test, standard deviation for the Wilcoxon rank sum test and P-value for the Wilcoxon rank sum test
Data in table represent number of consumer complaints against major U.S. airlines. If one complaint from table is arbitrarily chosen, determine the probability that it was filed against United Airlines.
What is the chance that stock will fall by more than 15% next month? What extra assumption are you making when replying this question?
Perform hypothesis testing on one variable's data.
By using the normal probability distribution, what is the probability the car will be repaired in 35 minutes or less?
What is the probability of selecting an accounting major, given that the person selected is a male?
Find the expected GPA when SAT = 800. Find E (GPA|SAT = 1,400). Comment on the difference.
What is the probability that there will be more than three trucks either being loaded or waiting?
At 5% level of significance, does this sample prove violation of guideline that average patient must pay no more than $250 out-of-pocket? Write your hypotheses and decision rule.
Find the probability that a women develops breast cancer given that she has a family history of breast cancer._____________
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