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Provide an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test. Explain how you would settle on a reasonable level of significance for your scenario. Also explain what the type I and II errors would be if you reached the incorrect conclusion in your test.
The length of time for one individual to be served at a cafeteria is a random variable having a lognormal distribution with a mean of 10 minutes and standard deviation of 2 minutes.
Investigate the comparative pros and cons of the mean and the median. Find examples where the mean is more appropriate than the median and vice-versa. Discuss the locations of the mean, median and mode for a normal, left-skewed and right-skewed di..
Test the equality of the means of three populations.
USA Today reported on preferred types of office communication by different age groups. Suppose the results were based on a survey of 500 respondents in each age group.
Suppose a statistician chose to test a hypothesis at sigma = 0.01. The critical value for a right-tailed test is +2.33. If the test value were 1.97, what would the decision be?
If alpha level is changed from a = 0.05 to a = 0.01. What occurs to boundaries for critical region?
In StaTScan what is the difference between a spatial cluster size to 25% of the population risk and one with 50% window ? In StaTScan what is the difference between space-time permutation and space-time?
Hamburger Joe's sells the best burgers in town. The variable unit cost for making one burger is $.97. The fixed cost of making burgers for 12 months will be a total of: $140,000.
Compute the mean and variance of the following discrete probability distribution. A cola-dispensing machine is set to dispense on average 7.00 ounces of cola per cup. The standard deviation is 0.10 ounces. The distribution of amounts dispensed foll..
What is an independent sample and what is a related sample? When should researchers use varying hypothesis tests for the different types of samples?
Break-even analysis is an important part of fiscal education. Select an item or product used in a healthcare organization and describe how you would calculate the break-even point.
A survey of 10 different suburbs in Dallas Texas found the average gasoline to be $ 1.294 a gallon with a standard deviation of $ .0526. What is the critical value using a=.05 and what is the test value.
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