QUIZ-2_Week-2_FSAWRP: Check for understanding:

According to the normal distribution, if we move 1 respect to the mean, what percentage of data lays on this range?:

If you pretend to calculate the confidence interval (ULC) or (LCL), what is the most appropriate value of Z?

According to the theory, the expression

is used when the replication for each group is:

According to the following control chart we can conclude

Note: data was collected each month.

During all the period, the behavior of the pH into the system is considered an adequate operative parameter.
After the third week, the pH operative parameters are uncontrolled.
Instead of the sharp decrease of the pH after week four, the pH values are still in a control zone.
After the perturbation of the pH value, it returns to the control zone at the end of the measurable process.

Match the word to its meaning

It refers to how close a sample measurement is to the actual population value

It is the degree to which repeated measurements achieve the same results under unchanged conditions.

A certificate laboratory must ensure that all the results are: