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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?
At the .10 significance level you will test to determine if there has been an increase in selling time. Assuming we are using a t test what will be the critical value"?
Accidents at a chemical plant occur at a rate of 1.9 per month. Find: The expected number of accidents in a year? The probability of no accidents next month?
Construct a 95% confidence interval for the proportion and calculate the P value for the given test.
If gambler rolls two dice and gets sum of four, he wins $10; and if he gets sum of three, he wins $25. Cost to play game is $5. What is expectation of this game?
For adults 60 years or older, they found a mean daily intake of 721 mg with a standard deviation of 454 mg. Using these values for the mean μ and standard deviation σ for the U.S. population:
The data results are based on serum continine levels for each group. The claim is that exposure to tobacco smoke (as second-hand smoke) corresponds to higher levels of cotinine.
The Martin Company is in the process of planning for new production facilities and developing a more efficient distribution system design. At present, it has one plant at St.Louis with a capacity of 30000 units.
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience?
Assume gasoline prices for a region are normally distributed. do the data you obtain provide enough evidence to reject the claim? use 1% level of significance.
Determine the shape of chi-square distribution?
Medicare spending per patient in different U.S. metropolitan areas may differ. Based on the sample data below, is the average spending in the northern region significantly less than the average spending in the southern region at the 1 percent leve..
Super Markets, Inc. is considering expanding into the Scottsdale, Arizona, area. Ms. Luann Miller, Director of Planning, must present an analysis of the proposed expansion to the operating committee of the board of directors
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