5. [52219.09 Points] DETAILS PREVIOUS ANSWERS BBBASICSTATBACC 8.1.018.MI. MY NOTES ASK YOUR TEACHER What price do farmers get for their watermelon crops? In the third week of July, a random sample of 40 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that a is known to be $1.92 per 100 pounds. (a) Find a 90% condence interval for the population mean price {per 100 pounds) that farmers in this region get for their watermelon crop (in dollars). What is the margin of error (in dollars)? (For each answer, enter a number. Round your answers to ma decimal places.) lower limit s m 3: upper limit 3; 3: margin of error 5; m x (b) Find the sample size necessary for a 90% condence level with maximal error of estimate E = 0.25 for the mean price per 100 pounds of watermelon. (Enter a number. Round up to the nearest whole number.) farming regions (c) A farm brings 15 tons of watermelon to market. Find a 90% condence interval for the population mean cash value of this crop (in dollars). What is the margin of error (in dollars)? Hint: 1 ton is 2000 pounds. {For each answer, enter a number. Round your answers to two decimal places.) lower limit $ upper limit 1; margin of error