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You are the shipping manager at the postham company you are interested in the percentage of packages delivered damaged a simple random sample of 500 packages yiields 16 delivered damaged and 484 delivered undamaged how many packages should be sampled in order to be 90% confident of being within 0.9% of the actual population percentage delivered damaged.
Standard deviation of 2.5 inces approximately what percentage of american women are taller than 58.5 inches, but shorter than 68.5?
The American Automobile Association checks the prices of gasoline before many holiday weekends.
For a population with a mean of (u)=50 and a standard deviation of (o)=10, how much error on average would you expect between the sample mean (M) and the population mean for the following samples
Two events are mutually exclusive: If their intersection is 1, If they have no sample points in common.
Determine a 95% confidence interval for the mean efficiency of a given batch of motors. If we want to cut the confidence interval by 1/3, how many motors should be tested?
In a random sample of 80 items, the defect rate is 5% but the manager claims that this is only a sample fluctuation and production is not really out of control. At the 0.01 level of significance, does the data provide sufficient evidence that the ..
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11.
Of 1338 people who came into a blood bank to give blood, 253 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.
The Roller Products Company produces roller skates and skateboards. It has three production lines. Production line 1 makes skateboard platforms.
In a sample of 64 patients, suppose that 47 showed allergic reduced reaction and 17 show increased reaction. Are these results sufficient to conclude a significant effect?
I am to compute expected values, test stat, use p-value approach and determine critical value with alph at .05
First-order regression model was fit to data. Part of printout follows?
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