For the supermarket example in Section 6 1, suppose that the is are 7 16 for store A, and 3 16 for each of stores B, C, and D Show that is unbiased, and find its variance Do you think that the sampling scheme with these is is a good one ...

As shown in 63 for the generalcase Using 64 This i ...

For the supermarket example in Section 6.1, suppose that the is are 7/16 for store A, and

Question:

For the supermarket example in Section 6.1, suppose that the ψi’s are 7/16 for store A, and 3/16 for each of stores B, C, and D. Show that ṫψ is unbiased, and find its variance. Do you think that the sampling scheme with these ψi’s is a good one?

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