Question: 4. A machine is designed to fill canvas sacks with 30 pounds of flour. A simple random sample of 40 sacks shows a mean weight

4. A machine is designed to fill canvas sacks with 30 pounds of flour. A simple random sample of 40 sacks shows a mean weight of 29.7 pounds and a standard deviation of 0.14 pounds. a. Construct a 95% confidence interval for the true mean weight of the sacks. (3 points) b. Is the machine filling the sacks accurately? Explain your reasoning

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