hat price do farmers get for their watermelon crops? In the third week of July, a random sample of 44 farming regions gave a sample mean of x = $6.34 per 100 pounds of watermelon. Assume that ? is known to be $1.92 per 100 pounds. (a) Find a 88% confidence interval for the population mean price (per 100 pounds) that farmers in this region get for their watermelon crop. What is the margin of error? (Round your answers to two decimal places.) lower limit    $______ upper limit     $______ margin of error     $______ (b) Find the minimal sample size necessary for a 88% confidence level with maximal error of estimate E = 0.25 for the mean price per 100 pounds of watermelon. (Round your answer to a whole number.) _______farming regions

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