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Perform each of the following:
a. State the hypotheses and identify the claimb. find the critical valuesc. compute the test valuesd. make the decisionse. summarize the results.
A raincoat manufacturer wants to know whether customers prefer any specific color over other colors in raincoats. He selects a random sample of 50 raincoats sold and notes the colors. The data are shown below.
Color Yellow Red Green BlueNumber Sold 17 13 8 12
At a = 0.10, is there a color preference for the raincoats?
Construct a 95% confidence interval estimate for the population proportion of administrative professionals who prefer cash bonuses.
Does a regression model imply causation? Why or why not? Provide an example which provides and independent and dependent variable from your place of work.
Since purchasing the software the average delivery time over twenty delivery days was 8.6 hours. At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
A computer password consists of four characters. The characters can be one of the 26 letters of the alphabet. Each character may be used more than once.
The firm has already decided that any sample mean below 78 or above 82 will signal the workers that the process is not working properly.
The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Assume 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71.
What is the probability that there will be a stock out? Given that you, the maintenance officer at the facility, want the probability of a stock out to be no more than 5% what should the reorder point be?
Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.
For the samples summarized below, test the hypothesis at ∞ =.05 that the two variances are equal. Variance Number of data values Sample 1 19 8 Sample 2 9 18
Assume company uses (100, 5) sampling plan to find out whether batch of 100,000 chips is acceptable. a) Compute the probability of rejecting a batch which has 3% defectives?
Do you view a chocolate bar as delicious or as fattening? Your attitude may depend on your gender. In a study of American college students, Rozin, Bauer and Catanese (2003) examined the importance of food as a source of pleasure versus concerns ab..
Use the Standing data set to develop a point estimate of the number of minutes during an NFL game that players are standing around between plays. Round your answer to two decimal places. What is the sample standard deviation? Round your answer to ..
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