Last summer the following Spokane area filling stations are selected at random and the price of a gallon of unleaded gas is recorded.Gas prices are known to follow a normal distribution.Use the tables in your text.Do not use Excel.

1. What is the point estimate used to estimate the population mean? Round to 2 decimal places.

2. What is the sample standard deviation? Round to 4 decimal places.

3. Use 95% confidence level to estimate the population mean gas price in the Spokane area last summer. Round to 2 decimal places.Lower Limit is--?Upper limit is--?

4. Is it reasonable to conclude that the mean Price Per Gallon of Gas in Spokane was $3.71?

Station Price

Costco-N Division 3.74

Holiday-Argonne 3.76

Conoco-Newport Hwy 3.71

Mobile-W Geiger 3.89

Texaco-N Ash 3.89

Flying J-Broadway 3.85

Chevron-Deer Park 4.11