Question: Use Norman's mean weight of 46.2 lbs. and standard deviation of 2.5 lbs. of flour. Determine a confidence interval for the mean weight of flour needed using a sample of 26 loaves. Use a confidence level of 90%. a. Degrees of freedom = _____. b. Critical value = _____. c. Value of maximal error = _____. d. Value confidence interval = _____.

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