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In a survey conducted by CareerBuilder.com, employers were asked if they had ever sent an employee home because they were dressed inappropriately (June 17, 2008, www.careerbuilder.com). A total of 2765 employers responded to the survey, with 968 saying that they had sent an employee home for inappropriate attire. In a press release, CareerBuilder makes the claim that more than one-third of employers have sent an employee home to change clothes. Do the sample data provide convincing evidence in support of this claim? Test the relevant hypotheses using a 5 .05. For purposes of this exercise, assume that it is reasonable to regard the sample as representative of employers in the United States.
Calls arriving at a telephone switch are either voice calls (v) or data calls (d). Each call is a voice call with probability p, independent of any other call. Observe calls at a telephone switch until you see two voice calls.
Is there evidence of difference in mean life of bulbs produced by the two kinds of machines. What is your conclusion?
the machining center at a production facility has three lathes of differing ages and thus precision. the oldest machine
Determine the point estimators (in thousand hours) for the above data - Construct a 95% confidence interval for the true mean lifespan of X.
What is a binomial coefficient? What does it represent in the formula for a binomial probability?What is a factorial?
What does this suggest about the distribution of wait times for these two procedures?
Complete the frequency table with frequency and relative frequency. Express the relative frequency to three decimal places. What percentage of the adults in this sample has an IQ score of at least 110?
A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients.
A 6 sided dice will be rolled and the die will continue to be rolled until a 3 is obtained for the third time. What is the expected number of die rolls needed?
Explain the difference between testing a single mean and testing the difference between two means. What two assumptions must be met when one is using z test to test differences between two means?
1) State the null and alternate hypothesis. 2) Calculate P, then determine whether the data provide sufficient evidence to conclude that the mean mass of the birds in the area surrounding the feeder is greater than the mean mass of the general po..
two basketball players carmelo and jason independently attempt a free throw. the probability that jason makes his free
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