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During a recent year the average cost of making a movie was $54.8 million. This year, a random sample of 15 recent action movies had an average production cost of $62.3 million with a variance of $ 8 million. At the 0.05 level of significance, can it be concluded that it costs more than average to produce an action movie? Use the P value method.
What kind of statistical test best did you use?
Use the list of random digits below to assign 4 men and 2 women to the shark fin treatment. Read the table from left to right, first selecting the 4 men and then the 2 women. Use the numerical labels given in the chart to the names.
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
The population in favor of Candidate A is significantly more than 80%. The value of the test statistic and the p-value respectively are?
Among its various routes, a transit agency operates a trolley line. The line has a total of 18 trolley cars. Some of these cars are unavailable because they are being maintained or repaired.
Selecting a Staff Person: At a community swimming pool there are 2 managers, 8 lifeguards, 3 concession stand clerks, and 2 maintenance people. If a person is selected at random, find the probability that the person is either a lifeguard or a mana..
According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink now than drank then.
Two years ago, a survey of all Wal-Mart customers indicated that the mean number of items bought per day by male customers was 8.3 with a standard deviation of 3.7.
Table shows the smoking habits of group college students. If student is selected at random, determine the probability of getting someone who is man or a woman.
The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for the population mean?
How large sample should be selected in order to obtain p estimate with a bound of 0.08 on the error of estimation.
Critically discuss some examples of descriptive statistics? Why are they used in research? What is a confidence interval?
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