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The average weight of 40 randomly selected minivans is 4150 pounds. The standard deviation of all...

The average weight of 40 randomly selected minivans is 4150 pounds. The standard deviation of all minivans is 480 pounds.

a)       Define the parameter of interest.

b)       Find the 88% confidence interval for the parameter. Check the required condition(s) to validate the interval. Interpret the interval in the context of the question.

Math   Statistics-And-Probability   
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