The mean annual premium for automobile insurance in the United States is $1503 (

Question

The mean annual premium for automobile insurance in the United States is $1503 (Insure.com website, March 6, 2014). Being from Pennsylvania, you believe automobile insurance is cheaper there and wish to develop statistical support for your opinion. A sample of 25 automobile insurance policies from the state of Pennsylvania showed a mean annual premium of $1440 with a standard deviation of s = $165.

If required, enter negative values as negative numbers.

Question: What is a point estimate of the difference between the mean annual premium in Pennsylvania and the national mean (to the nearest dollar)?

**I thought it would be $63 since $1503 - $1440 = $63 but it says that is incorrect.

Explanation / Answer

well you seems to be right in your approach , the only thing I ahve in mind is tht differnce =1440-1503=$-63

please try and revert.

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