What price do farmers get for their seedless watermelon crops? In a recent month, a simple random sample of 45 farming regions gave a sample mean of $12.15 per 100 pounds of seedless watermelon. Assumer that=$1.44per 100 pounds.

Find a 90% confidence interval for the population mean price (per 100 pounds) that farmers in this region get for their seedless watermelon crop. (Round answers to two decimal places.)

margin of error: $per 100 pounds

lower limit: $per 100 pounds

upper limit: $per 100 pounds

What conditions were met for the above calculations to be valid? (Select all that apply.)

• The price per 100 pound of seedless watermelon needs to be uniformly distributed
• is known
• The price per 100 pound of seedless watermelon needs to be normally distributed
• large enough sample size n
• is unknown

Find the sample size necessary for a 90% confidence level with an margin of errorE=0.73for the mean price per 100 pounds of seedless watermelon. (Increase to the next whole number.)

If a farmer brings in 19 tons of seedless watermelon to a market, find a 90% confidence interval for the population mean cash value for 19 tons of seedless watermelon. Note: 1 ton = 2000 pounds. (Round your answers to two decimal places.)

lower limit: $

upper limit: $