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There are five sales associates at Mid-Motors Ford. The five representatives and the number of cars they sold last week are:
a) How many different samples of size 2 are possible?
b) List all possible samples of size 2, and compute the mean of each sample.
c) Compare the mean of the sampling distribution of sample means with that of the population.
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee drinks per day follows a normal distribution.
Perform a parametric analysis by assessing the fractional change in the probability of failure with respect to a small change in the mean and standard deviation of selected variable.
Assume that the amount your town's population grows every year is fixed or constant. Utilize your equation in part b to approximate the population in the year 2030.
Find the probability that a customer with 2 or more late payments will actually default on his payments and, in light of this probability, criticize the manager's credit plan.
The manager requires the estimate to be within 1.0 minutes of the population value. What sample size is needed?
Test for single Proportion - Are the data consistent with the model? Answer yes or no, and explain briefly.
Construct a relative frequency distribution for the weights of regular Coke by starting the first class at 0.7900 lb. and use a class width of 0.0050 lb.
The following frequency distribution reports the number of frequent flier miles, reported in thousands, for employees of Brumley Statistical Consulting, Inc. during the first quarter of 2004.
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
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