A Sample of 32 Orders for a Home Shopping Channel $\$ 78.25 \pm \$ 37.50$

question 17

Multiple Choice

A sample of 32 orders for a home shopping channel has an average of $78.25.The standard deviation for all orders (the population) is $37.50.A 90% confidence interval around this sample mean would be:

• A)\(\$ 78.25 \pm \$ 37.50\)
• B)\(\$ 78.25 \pm \$ 10.87\)
• C)\(\$ 78.25 \pm \$ 6.63\)
• D)\(\$ 37.50 \pm \$ 6.63\)
• E) \(\$ 37.50 \pm \$ 1.64\)

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