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The driver of a diesel-powered automobile decided to test the quality of three types of diesel fuel sold in the area based on mpg. Test the null hypothesis that the three means are equal using the following data. Make the usual assumptions and take a = 0.05.-
Brand A: 38.7
39.2
40.1
38.9
Brand B: 41.9
42.3
41.3
Brand C: 40.8
41.2
39.5
40.3
Standard deviation was 16. Determine the 99% confidence interval of true mean. Suppose the variable is normally distributed.
imagine the following game of chance. there are four dollar bills on the table. your roll a fair die repeatedly. every
The firm uses $200,000 of its cash balance to pay off a current liabilities. Calculate the current ratio before and after this transaction.
Assume you have the following data: H1: µ ? 200, S =30, n = 64, and X =218. Conduct a two tailed hypothesis test at the 0.05 significance level.
alice has a ten-day vacation from school and she wants to spend some of it reading. beside her favorite comfy chair
The cutoff (or cutoffs), and the score of the sample on this distribution. Then explain your answer to someone who has never had a course in statistics (but who is familiar with mean, standard deviation, and Z scores).
suppose the cost of an observation varies from stratum to stratum where the cost of sampling a unit from stratum j is
A file cabinet manufactor estimates that 5% of it's file cabinets will have drawers that close improperly. Assume a production of 120 cabinets is completed. What is the mean and the standard deviation of this distribution?
calculate the variance and the standard deviation of this probability distribution?calculate the expected rate of
If the population standard deviation is σ = 20 is the 6 point effect large enough to be statistically significant? Use the two - tailed test with α = .05
the time in minutes between telephone calls at an insurance claims office has the expo- nential probability
Explain in your own words why it is important in some situations to consider future deci sions as well as the immediate decision at hand. Can you give an example from your own experience of an occasion in which you had to make a decision while exp..
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