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The mean salary of federal government employees on the General Schedule is $59,593. The average salary of 30 state employees who do similar work is $58,800 with a standard deviation of $1500. at the 0.01 level of significance, can it be concluded that state employees earn on average less than federal employees?
Cold Stone Creamery has recorded demand for the particular flavor of ice cream during first seven days of July. Results are as follows: Forecast the sales for 8th day of July using 5-day moving average.
For the following cases, determine whether the sampling is dependent or independent. Explain your conclusion.
A firm plans to hire 100 employees during the year. It expects that 25 of these employees will obtain graduate degrees within the next 5 years of being hired.
Use the normal-theory method to test for significant differences in 12-month mortality between the two groups.
To determine whether the mean is greater than 16 ounces using large sample test.
Select an activity you do on a regular basis (e.g., cooking a meal, cleaning the house, doing homework, etc.) and discuss how you could apply statistical quality control to improve the quality of the output of the activity you choose.
Reggie Miller of the Indiana Pacers is the National Basketball Association's best career free throw shooter, making 89% of his shots. Assume that late in a basketball game, Reggie Miller is fouled and is awarded two shots.
Any state auto insurance company took a random sample of 370 insurance claims paid out during a 1-year period. the average claim was $750 with a standard deviation of $150. find .99 confidence interval for the mean claim payment.
When investigating the distribution of a data set, which is more effective: a frequency distribution or a histogram? Why?
With the sample standard deviation of 12 lbs. Determine the 90% confidence interval of true mean weight of all college wrestlers.
For each of the following studies, say whether you would use a t test for dependent means or a t test for independent means.
In this problem set you will get some practice performing a linear regression analysis. If you use Statdisk or Excel to perform any portion of these analyses, please include the results, label them, and refer to them accordingly in your interpreta..
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