Question

In: Math

An online shoe retailer sells women’s shoes in sizes 5 to 10. In the past orders...

An online shoe retailer sells women’s shoes in sizes 5 to 10. In the past orders for the different shoe sizes have followed the distribution given in the table provided. The management believes that recent marketing efforts may have expanded their customer base and, as a result, there may be a shift in the size distribution for future orders. To have a better understanding of its future sales, the shoe seller examined 1,174 sales records of recent orders and noted the sizes of the shoes ordered. The results are given in the table provided. Test, at the 1% level of significance, whether there is sufficient evidence in the data to conclude that the shoe size distribution of future sales will differ from the historic one.

Shoe Size Past Size Distribution Recent Size Frequency
5.0 0.02 20
5.5 0.03 23
6.0 0.07 88
6.5 0.08 90
7.0 0.20 222
7.5 0.20 258
8.0 0.15 177
8.5 0.11 121
9.0 0.08 91
9.5 0.04 53
10.0 0.02 31

Solutions

Expert Solution

This is chi-square goodness of fit

Expected = n* pi

here n= 1174

since we fail to reject the null hypothesis, we conclude that there is not sufficient evidence in the data to conclude that the shoe size distribution of future sales will differ from the historic one.


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