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Consider the hypothesis test given by:
H0: μ = 530H1: μ ≠ 530
In a random sample of 85 subjects, the sample mean is found to be x(bar) = 522.3. Also, the population standard deviation is σ = 29.
Determine the P-value for this test. Is there sufficient evidence to justify the rejection of H0 at the α = 0.01 level? Explain.
You are working on an analysis of your company's current cost structure reviewing the various fixed and variable costs within your firm.
Without constructing the 98% confidence interval for the rate of effectiveness, would you expect the interval to be longer or shorter compared to the 95% confidence interval? Why?
Illustrate how you could use the interrupted time series design to naswer a real world research question through the use of archival data.
Which of the following Venn diagrams has shaded the event that the contractor wins exactly one of the contracts and evaluate the mean time to complete the entire homework assignment
A dice is thrown thrice. What is the probability that the largest score that turns up is three times the smallest?
Find the mean score, X , of the data in the frequency distribution above and find the standard deviation of the scores in the frequency distribution above.
How many ways are there to select a subcommittee of 7 members from among a committee of 21 and how many possible passwords are there if 7 of the letters of the alphabet can be used by the system?
How many bolts should be sampled in order to make us 95% confident that the sample mean bolt length is within .02 inches of the true mean bolt length?
The herbal formula is effective in preventing colds? Is the probability that the observed difference occurred by chance small, less than or equal to 1 in 20 (0.05)?
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
Use the auxiliary variable approach to model this problem and write a short memo to the marketing manager explaining the solution and sensitivity information.
SAT verbal scores are normally distributed with a mean of 423 and a standard deviation of 91. Use the Empirical Rule to determine what percent of the scores lies between 423 and 514.
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