Pennsylvania Refining Company is studying the relationship between the pump price of gasoline and the number of gallons sold. For a sample of 13 stations last Tuesday, the correlation was 0.73.
a. State the decision rule for 0.025 significance level. (Round your answer to 3 decimal places.)
b. Compute the value of the test statistic. (Round your answer to 3 decimal places.)
c. Can we conclude that the correlation in the population is greater than zero? Use the 0.025 significance level.
