Question

Chi-squared test of independence and goodness-of-fit.

3. The distributor of Mixed Nut Special claims that the content per bag is 12%

brazil nuts, 25% peanuts, 20% cashew nuts, 28% hazlenuts and 15% walnuts.

Several bags were selected and the total numbers of nuts of each type were

recorded as follows:

	Brazil	Peanut	Cashew	Hazlenut	Walnut	Total
Observed	146	315	???	287	170	1130
Expected	???	???	???	???	???	???

1. Fill in the missing cells marked ???

2. Calculate the chi squared statistic for these data, and hence test the distributors’ claim. Which type(s) of nut seem to be over or under represented?

Answer 1