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Batches that consist of 50 coil springs from a production process are checked for conformance to customer requirements.The mean number of nonconforming coil springs in a batch is 5. Assume that the number of nonconforming springs in a batch, denoted as X, is a binomial random variable. What are n and p?
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
Suppose that sales of lemonade and sales of brownies are independent, determine standard deviation in his revenue.
Give an example of a null and alternative hypotheses. This can be a personal item or something at work. Additionally, identify the Type I and Type II Errors that could occur with your decision-making process.
What test can be performed to compare the percentage of participants who developed abnormal triglyceride levels between the vitamin A group and the trace group? Implement the test in Problem 10.68, and report a two tailed p value.
Determine the probability of selecting sample with a mean of more than $100,000 but less than $112,000.
In a random sample of 10 adults from a nearby county, the mean waste generated per person per day was 4.35 pounds and the standard deviation was 1.88 pounds.
A sample of 40 ovservations is selected from one population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observers is selected from a second population.
The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.
We are interested in testing to see if the variance of a population is less than 7. The correct null hypothesis is:
The table below lists deaths in Georgia in 2004, the estimated population of Georgia in 1994 and the U.S. population according to the 2000 census. Calculations should be done by hand, but feel free to use software to check your work.
While it can't be denied that advertising impacts sales, it is also true that advertising is expensive and companies want to advertise in ways that have the greatest benefit for the amount of money spent.
Absenteeism is distributed evenly throughout the week. The 0.01 level is to be used. The sample results are:
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