9. [49.09 Points] DETAILS BBBASICSTATEACC B.1.G1B.Ml. [ MY NOTES ] [ ASK YOUR TEACHER What price do farmers get for their watermelon crops? In the third week of July, a random sample of 41 farming regions gave a sample mean of E = $6.88 per 100 pounds of watermelon. Assume that o is known to be $1.90 per 100 pounds. (3) 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 two decimal places.) lower limit :15 upper limit $ margin of error $ (b) Find the sample size necessary:r for a 90% condence level with maximal error of estimate E = 0.43 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 answerr enter a number. Round your answers to two decimal places.) lower limit is upper limit $ margin of error '35