A coffee-dispensing machine is supposed to deliver 8 ounces of liquid into each paper cup, but a consumer believes that the actual mean amount is less. The consumer obtained a sample of 49 cups of the dispensed liquid with average of 7.75 ounces. If the sample variance of the dispensed liquid per cup is 0.81 ounces, and = 0.05, the p-value is approximately _________.

0.10

0.05

0.06

0.025

0.015