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At a certain university, the average cost of books per student was 400.00 last semester. In a sample of 40 students this semsester, their average cost was 340.00 with a standard deviation of 80.00. The dean of students believes that the costs are greater this semester. What is the test value for this hypothesis:
A) 15.00
B) 2.37
C) 0.38
D) 0.75
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
We are interested in testing to find out whether the variance of the population is vitally more than 0.003
Given a normal distribution of data, we know from the Empirical Rule that in between 2 standard deviations from the mean
At the .01 significance level, can we conclude that there is more variation?
Compare the percentage found in b) to percentage given by Empirical Rule and Chebyshev's Rule. (Make a table 3 x 3).
Either summarize your design or give an appropriate layout with table.
Compute a 5-month moving average forecast for June through January.
Random number generation based on discrete distribution and evaluate the average queue length, waiting time, and percentage utilization for each system.
Assume that 5,000 sales invoices are separated into four strata. Stratum 1 contains 50 invoices, stratum 2 contains 500 invoices, stratum 3 contains 1,000 invoices, and stratum 4 contains 3,450 invoices.
Recognize the given samples are independent samples or matched pairs.
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..
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