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It is often stated in three-shift manufacturing organizations that the quality of work on the second shift is worse than on the first, and that the quality of work on the third shift is worst of all. How would you go about testing that premise?
If there is a difference, what do you think some of the reasons might be?
A southern state has an unemployment rate of 6%. The state conducts monthly surveys in order to track the unemployment rate. In a recent month, a random sample of 700 people showed that 35 were unemployed.
What units represent the margin of error? Suppose you want to decrease the margin of error, but want to keep the 95% confidence interval. What do you need to do?
In the regression analysis involving 25 observations following estimated regresion equation was developed. hat(Y) = 10 - 18x1+3x2+14x3 also follwoing standard errors. Test stastic for testing significance of model is?
Sprinkler Systems. A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at least 135 degrees F.
According to Advertising Age, average base salary for women working as copywriters in advertising firms is higher than average base salary for men. The average base salary for women is $67,000 and the average base salary for men is $65,500 (Workin..
A basketball player has a history of making 75% of the foul shots taken during games. The player gets two shots at the foul line.
The wheat harvesting season is short. Farmers deliver their truck loads of wheat to a giant central storage bin within a two-week span. Because of this, wheat-filled trucks waiting to unload and return to the fields have been known to back up for ..
What are the benefits and drawbacks of traditional and authentic assessments in math and science?
State the quick rule for a significant correlation and explain its limitations. What sums are needed to calculate a correlation coefficient? What are the two ways of testing a correlation coefficient for significance?
According to the 1996 Statistical Abstract of the United States, 7.6% of the scores on the verbal portion of the Scholastic Aptitude Test (SAT) exceeded 600.
The salaries of the employees of a corporation are normally distributed with a mean of $25,000 and a standard deviation of $5,000.
Merta reports that 74% of its trains are on time. A check of 60 randomly selected trains shows that 38 of them arrived on time. Find the probability that among the 60 trains 38 or fewer arrive on time.
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