A random sample of 31 sales charge showed a sample standard deviation of $50. A 90% confidence interval estimate of the population standard deviation is
A. 1715.101 to 4055.589.
B. 1596.458 to 4466.679.
C. 39.956 to 66.833.
D. 41.393 to 63.684.
Answer: D
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Indicate whether the statement is true or false
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Raymond Weil, a European manufacturer of premium watches, is trying to compete in the U.S. market with other fine watch brands. Its corporate website contains the following notice: "RAYMOND WEIL products are sold by official dealers only. The RAYMOND WEIL International Guarantee is offered exclusively to consumers in possession of a watch purchased from an official dealer." In the United States, Raymond Weil watches are not available in every jewelry or department store. For example, in large cities such as Boston, Washington, D.C., and San Francisco, there are only three retailers in each city that are official Raymond Weil dealers. Raymond Weil seems to be using
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