Solution Found!
State Gasoline Taxes Arandom sample of state gasoline
Chapter 7, Problem 8(choose chapter or problem)
State Gasoline Taxes Arandom sample of state gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents? 38.70_m_48.28. Assume normal distribution; yes. 38.4 40.9 67 32.5 51.5 43.4 38 43.4 50.7 35.4 39.3 41.4 Source: http://www.api.org/statistics/fueltaxes/
Questions & Answers
QUESTION:
State Gasoline Taxes Arandom sample of state gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents? 38.70_m_48.28. Assume normal distribution; yes. 38.4 40.9 67 32.5 51.5 43.4 38 43.4 50.7 35.4 39.3 41.4 Source: http://www.api.org/statistics/fueltaxes/
ANSWER:Step 1 of 3
Given:
The mean is the sum of all values divided by the number of values:
is the number of values in the data set.