A manufacturer claims that at least 40% of its customers use coupons. A study of 25 customers is undertaken to test that claim. The results of the study follow.
At a .05 level of significance, use Excel to test the manufacturer's claim.

Question

A manufacturer claims that at least 40% of its customers use coupons. A study of 25 customers is undertaken to test that claim. The results of the study follow.
  At a .05 level of significance, use Excel to test the manufacturer's claim.

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The Answer of A manufacturer claims that at least 40% of its customers use coupons. A study of 25 customers is undertaken to test that claim. The results of the study follow.
  At a .05 level of significance, use Excel to test the manufacturer's claim.

A Manufacturer Claims That at Least 40% of Its Customers