Which statement is NOT true?

Which statement is NOT true?

Select one:

a. This process is great, since the x-bar and Range charts are in control.

b. The average part dimension is between 10 and 11.

c. The x-bar chart is meaningless unless the Range chart is in control.

d. The Range chart should be plotted first.

In a normal distribution of measurements having a mean of 500 feet and a standard deviation of 100 feet, what percent of the distribution falls between 300 and 450 feet?

Select one:

a. 71%

b. 26%

c. 33%

d. 29%

In a normal distribution of measurements having a mean of 500 feet and a standard deviation of 100 feet, what percent of the distribution falls between 300 and 450 feet?

Select one:

a. 71%

b. 26%

c. 33%

d. 29%