Question
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The average age of a vehicle registered in Canada is about 97 months. If a random...
The average age of a vehicle registered in Canada is about 97 months. If a random sample of 31 vehicles is selected, find the probability that the mean of their age is between 101 and 105 months. Assume the standard deviation for the population is 21.
Solutions
Expert Solution
Given that, mean (μ) = 97 months
standard deviation 
= 21
Sample size (n) = 31
We want to find, 
Therefore, required probability is 0.1276
NOTE : If we used TI-83 plus calculator to find above probability we get, probability = 0.1275
milcah answered 1 year agoRelated Solutions
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