The control limits for an np chart are how many standard ...

[Starlight]

The control limits for an np chart are how many standard deviations above and below the expected number of defectives?
 a. one
  b. two
  c. three
  d. four

Question 2

Forecast errors
 a. are the difference in successive values of a time series
  b. are the differences between actual and forecast values
  c. should all be nonnegative
  d. should be summed to judge the goodness of a forecasting model

[briezy]

Answer to Question 1

c

Answer to Question 2

B

[Starlight]

Wow, this really help

[samiel-sayed]

Thanks for the timely response, appreciate it