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Compare and contrast a Difference of Means test with a Paired Difference test. What, fundamentally, are we testing for in each? When do you use the difference of means? When do you use the paired difference? Explain why in both instances.
a. What is the probability that one randomly selected student scores above 1100 on the GRE? b. Describe the sampling distribution of the sample mean for the 16 students.
what will be the standard deviation of the share price if it is assumed that there is a 95% probability that the value will be at least 64?
Develop a probability distribution for the number of students in the sample who watch soap operas.
The specification limits are set between 15.8 and 16.2 ounces. a) Compute and interpret the machine's Cp b) Compute and interpret the machine Cpk
The mean starting salary for college graduates in the spring of 2000 was$31,280. Assume that the distribution of starting salaries follows the normal distribution with a standard deviation of 3,330.
Simulate both one-and two-teller systems, calculate waiting time, average queue length, and percentage utilization for each system.
Study is conducted as to whether there is relationship between joggers and consumption of nutritional supplements.
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
What does confidence interval tell you? What does it mean? What 2 things can a researcher do to decrease width of a confidence interval? What are the effects?
Findout the margin of error for this survey if we want a 99 percent confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 3.3 emails per hour. Assume the arrival of these emails is approximated by the Poisson distribution.
Consider the experiment of tossing a fair coin three times and observing the number of heads that result (X = number of heads).
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