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A company's customer support division want to test to see if that wait time for a consumer to talk to a representative is under 10 minutes. The manager proposes to test one case where a a consumer was placed on hold. Is this a good testing strategy? If not what would be a better testing strategy? Could you form a Null Hypothesis or an Alternative Hypothesis? If yes, what would they be.
The manufacturer of a coffee dispensing machine claims the ounces per cup is normally distributed with population mean equal to 8 ounces and standard deviation equal to 0.9 ounces. If 50 cups of coffee were measured, what is the probability that.
Compute fraction of the employees cost between $1,500 and $2,000 per year? Evaluate percent that didn't have any dental expense.
LPP using the graphical method. Solveout the following linear programming problem utilizing the corner point method.
Suppose that n trials of a binomial experiment result in no successes.
Can researcher conclude that humidity has significant effect on eating behaviour? Use two-tailed test with a = 0.05.
According to the Insurance Institute of America, a family of four spends between $400 and $3800 per year on all types of insurance. Suppose the money spent is uniformly distributed between these amounts.
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
Develop a scatter diagram for the data and write a brief summary.
If statistically significant, do you think the difference is large enough to be important?
Calculate the mean and standard deviation of the following data sets, then produce a five number summary and box plot of data.
Find the probability that a randomly selected teacher earns and what sample size is necessary to double the standard error of the mean and what sample size is needed to cut the standard error of the mean in half?
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