Refer to question 70. Suppose the company would like to construct a 90 %

confidence interval for the increase in accounts receivable. Use the jackknife method to construct this confidence interval.

Question 70

A company is interested in estimating the value of accounts receivable for its 75 stores. To do this, the company collects information on 1990 and 1991 accounts receivable from a simple random sample of 10 stores. The results of this sampling study are given in the table.

Suppose 1990 accounts receivable were $ 1.4 million. Use the ratio method to estimate the accounts receivable for 1991.

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Store 1 2 234 5 6 7 8 9 10 1990 accounts receivable $15,600 9,510 27,000 18,000 32,000 22,200 25,200 15,000 19,600 9,900 1991 accounts receivable $16,200 8,900 29,000 19,200 32,500 19,000 28,500 17,000 24,000 11,100