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1. For a special pre-New Year's Eve show, a radio station personality has invited a small panel of promi- nent local citizens to help demonstrate to listeners the adverse effect of alcohol on reaction time. The reac- tion times (in seconds) before and after consuming four drinks are in data file XR11050. At the 0.005 level, has the program host made his point? Identify and interpret the p-value for the test.
2. A plant manager has collected productivity data for a sample of workers, intending to see whether there is a difference in the number of units they produce on Monday versus Thursday. The results (units produced) are in data file XR11051. Using the 0.01 level of signifi- cance, evaluate the null hypothesis that there is no dif- ference in worker productivity between the two days. Identify and interpret the p-value for the test, then con- struct and interpret the 99% confidence interval for the mean difference in productivity between the days.
The Gray Stone Rock Band will give 10 performances this season.Four of these will be only songs from the 70s. If Tony gets to pick two tickets at random, what is the probability that he will get both 70s tickets?
suppose you have two sets of normal data symmetric bell-shaped distributions both with a mean of 15. the variance for
in a study of pregnant women and their ability to correctly predict the sex of their baby 56 of the pregnant women had
In 1992, the FAA conducted 90,000 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, construct a 95 percent confidence interval for the population proportion of positive drug tests.
The annual report of Dennis Industries cited these primary earnings per common share. What is the arithmetic mean primary earnings per share of common stock and The variance?
according to the national postsecondary student aid study conducted by the u.s. department of education in 2008 62 of
His sample size was 50,000. His method worked better than the Digest"s method. He predicted the correct winner, but was still off by 6 percentage points. How did he predict the Digest prediction so well?
damon is a used car salesman in florida. the chance that he meets his monthly sales goals are as
Enrollment for the last four semesters had been 120, 126, 110, and 130. Develop a forecast of enrollment next semester.
according to the census there were 61 people per square mile. this is called the population density in a certian
two students a and b are both registered for a probability class. neither student has a sterling attendance pattern.
1.i wish to find a 95 confidence interval for the mean number of times men change channels with a remote control during
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