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There is concern about the speed of automobiles travelling over a particular stretch of highway. For a randomsample of 28 automobiles, radar indicated the following speeds in miles per hour
59 63 68 57 56 71 58 69 53 55 60 67 51 59
53 64 56 57 66 61 65 70 64 65 57 56 61 59
a. Check the evidence of non normality
b. Find a point estimate of the population mean that is unbiassed and efficient
c. Use an unbiassed estimation procedure to find a point estimate of the variance of the sample mean.
Using excel, calculate the correlation coefficient, r, for the two variables. How would you interpret this measure?
evaluate the practice of altering the alpha level so that a two-tailed test will have a 5 rejection region on both
in a certain population 60 of people have blond hair.a what is the probability that in a group of 10 people from this
Determine the standard deviation of the difference between the diameter of the hole and the diameter of the bolt. (Round your answer to 4 decimal places.)
Kolzak Appliance has just received a shipment of 10 TV sets. Shortly after they were received, the manufacturer called to report that he had inadvertently shipped 3 defective sets.
Use the confidence level and sample data to find a confidence interval for estimating the population mean m.
Identify the null hypothesis, alternative hypothesis, test statistic, Critical Values, conclusion about the null hypothesis, and final conclusion that addresses the original claim.
1. Can you think of some different alternatives that the ODA might consider for control ling the gypsy moths? 2. Describe a decision that you have had to make recently that was difficult. What were the major issues? What were your alternatives? Did..
Find a 95% confidence interval for the proportion of customers who will purchase at least one item and pay at least $500 total if they receive a coupon for 5% off.
The investigator would like to make estimates for each class as well as the total body of undergraduates. Choose a method of sampling and give the reasons for your choice.
What is the domain of a quadratic function? Can you give an example please.
the mean score of a college entrance test is 500 the standard deviation is 75. the scores are normally distributed.
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