Question

What is the age distribution of adult shoplifters (21 years of age or older) in supermarkets? the following is based on information taken from the national retail federation. A random sample of 895 incidents of shoplifting gave the following age distribution. Estimate the mean age, sample variance, and sample standard deviation for the shoplifters. For the class 41 and over, use 45. 5 as the class midpoint. (round your answers to one decimal place. ).

Answer 1

The age breakdown of supermarket shoplifters who are at least 21 years old is 163.5.

Given that,

The information used in the following was obtained from the national retail federation. Following is the age distribution of 895 occurrences of shoplifting taken as a random sample. Calculate the shoplifters' sample variance, sample standard deviation, and sample mean age. Use 45. 5 as the class midpoint for students who are 41 and older.

We have to find what is the age breakdown of supermarket shoplifters who are at least 21 years old.

We know that,

To estimate the mean age ,

The formula is x = ∑ (xi×fi) /∑fi

x = (6222+ 126735 +13377) / (244+357+294)

x = 146344/895

x= 163.5

Therefore, The age breakdown of supermarket shoplifters who are at least 21 years old is 163.5.

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