In a sample of 100 steel wires the average breaking strength is 52 kN, with a standard deviation of 2 kN. Find a 95% confidence interval for the mean breaking strength of this type of wire. Round the answers to three decimal places. 1.The 95% confidence interval is ( , ). In a sample of 100 steel wires the average breaking strength is 52 kN, with a standard deviation of 2 kN. Find a 99% confidence interval for the mean breaking strength of this type of wire. Round the answers to three decimal places. 2. The 99% confidence interval is In a sample of 100 steel wires the average breaking strength is 52 kN, with a standard deviation of 2 kN. An engineer claims that the mean breaking strength is between 51.7 kN and 52.3 kN. With what level of confidence can this statement be made? Express the answer as a percent and round to two decimal places. 3. The level of confidence is %.
In a sample of 100 steel wires the average breaking strength is 52 kN, with a standard deviation of 2 kN.
Find a 95% confidence interval for the mean breaking strength of this type of wire. Round the answers to three decimal places.
1.The 95% confidence interval is ( , ).
In a sample of 100 steel wires the average breaking strength is 52 kN, with a standard deviation of 2 kN.
Find a 99% confidence interval for the mean breaking strength of this type of wire. Round the answers to three decimal places.
2. The 99% confidence interval is
In a sample of 100 steel wires the average breaking strength is 52 kN, with a standard deviation of 2 kN.
An engineer claims that the mean breaking strength is between 51.7 kN and 52.3 kN. With what level of confidence can this statement be made? Express the answer as a percent and round to two decimal places.
3. The level of confidence is %.
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