What price do farmers get for their watermelon crops? In the third week of July, a random sample of 44 farming regions g

[answerhappygod]

What 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 = $6.88 per 100
pounds of watermelon. Assume that 𝜎 is known to
be $1.96 per 100 pounds.
(a) Find a 90% 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.)
(b) Find the sample size necessary for a 90% confidence level with
maximal error of estimate E = 0.43 for
the mean price per 100 pounds of watermelon. (Round up to the
nearest whole number.)
farming regions

(c) A farm brings 15 tons of watermelon to market. Find a 90%
confidence interval for the population mean cash value of this
crop. What is the margin of error? Hint: 1 ton
is 2000 pounds. (Round your answers to two decimal places.)