Question 6The 95% confidence interval for these parts is 56.98 to 57.05 under normal operations. A

systematic sample is taken from the manufacturing line to determine if the production process is still within acceptable levels. The mean of the sample is 57.06. What should be done about the production line?

A)Stop the line as it is close to the confidence interval

B)Keep the line operating as it is close to the confidence interval

C)Keep the line operating as it is outside the confidence interval

D)Stop the line as it is outside the confidence interval

Question 7

In a sample of 57 temperature readings taken from the freezer of a restaurant, the mean is 29.6 degrees and the standard deviation is 2.7 degrees. What would be the 80% confidence interval for the temperatures in the freezer?

A)(24.25, 35.05)

B)(29.14, 30.06)

C)(31.90, 32.44)

D)(26.91, 32.31)

Question 8

What is the 99% confidence interval for a sample of 36 seat belts that have a mean length of 85.6 inches long and a standard deviation of 2.9 inches?

A)(84.4, 86.8)

B)(82.7, 88.5)

C)(84.6, 86.5)

D)(84.8, 86.4)

Question 9

If two samples A and B had the same mean and standard deviation, but sample A had a smaller sample size, which sample would have the wider 95% confidence interval?

A)Sample B as it has the larger sample

B)Sample B as its sample is more disperse

C)Sample A as it comes first

D)Sample A as it has the smaller sample

Question 10

Why might a company use a lower confidence interval, such as 80%, rather than a high confidence interval, such as 99%?

A)They make children’s toys where imprecision is expected

B)They track the migration of fish where accuracy is not as important

C)They are in the medical field, so cannot be so precise

D)They make computer parts where they are too small for higher accuracy

 

Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"