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The mean length of the work week for the population of American workers was reported to be 39.2 hours with a standard deviation of 4.8 hours in September, 2000. A researcher wants to determine if the average work week has changed from 39.2 hours. A sample of 112 workers yielded a mean of 38.5 hours. Based on this sample, can we conclude at the 5% significance level that the average length of the work week has changed?
A. State the null and alternate hypotheses
B. Identify the test statistic
C. State the decision rule.
D. Show the appropriate calculations and state the statistical decision.
E. What conclusions can you draw concerning the length of work week for the population of American workers?
Let the national income model be: Y= c+1+G C=20+0.6y I=0.2y G=20 Where y= income, C= consumption, I= investment and G=government expenditure find y, C and I from the model. By quan
October Transactions Date Transaction Description Oct. 1 Began business by making a deposit in a company bank account of $12,000, in exchange for 1,200 shares of $10 par value com
#how will understand question..moving average method problems for 4yearly&5yearly also
which method is better for new product to gather the information they need,primary data or secondary data?
Define why Equipment show up on a profit and loss statement? The buy of devices that will be used in a business is not revealed on the revenue and reduction declaration. Howeve
The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 89 inches, and a standard deviation of 16 inches. What is the probability that
state the advantage of expansion of solid
Two components, A and B, are used as follows: normal usage - 50 per week each minimum usage - 25 per week each maximum usage - 75 per week re-order quantity - A:300; B:500 re-order
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Tuddenham and Snyder obtained the following results for 66 California boysat ages 6 and 18 (the scatter diagram is football-shaped): average height at 6 ˜ 3 feet 10 inches, SD˜1.7
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