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ESI3215 RVCC 1225 2. Six measurements are taken of the thickness of a piece of 18-guage sheet metal. The measurements (in mm) are: 1.316, 1.308, 1.321, 1.303, 1.311, 1.310 a. Make a boxplot of the six values. b. Should the t distribution be used to find 99% confidence interval for the thickness? If so, find the confidence interval. If not explain, why not. c. Six independent measurements are taken of the thickness of another piece of sheet metal. The measurements this time are: 1.317, 1.318, 1.301, 1.307, 1.374, 1.323. Make a boxplot of these values. d. Should the t distribution be used to find 99% confidence interval for the thickness? If so, find the confidence interval. If not explain, why not. 3. A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength μ greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1356 kPa and their standard deviation is 70 kPa. A. What is the most appropriate null hypothesis regarding the population mean µ. Indicate the alternate hypothesis as well. Find the P-value. B. Can you conclude that the blocks meet the specification? Or are you convinced that they do
ESI3215 RVCC 1225 confidence interval. If not explain, why not. c. Six independent measurements are taken of the thickness of another piece of sheet metal. The measurements this time are: 1.317, 1.318, 1.301, 1.307, 1.374, 1.323. Make a boxplot of these values. d. Should the t distribution be used to find 99% confidence interval for the thickness? If so, find the confidence interval. If not explain, why not. 3. A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength μ greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1356 kPa and their standard deviation is 70 kPa. A. What is the most appropriate null hypothesis regarding the population mean u. Indicate the alternate hypothesis as well. Find the P-value. B. Can you conclude that the blocks meet the specification? Or are you convinced that they do not? Explain your answer. Questions are worth 1 Points each Submissions will be graded on accuracy and showing your work.