sugarnspicezz

04-24-2006, 05:59 PM

I NEED HELP WITH THESE QUESTIONS.. I HAVE NO CLUE WHAT TO DO.

PLEASE HELP

1.) find the mean control chart if 50 samples, each of size 25 are taken with the results: mean 8, sample variance 4

If mean moves to 9, what is the prob. that there are no more than 3 Nonconf. in the next 5 samples

2.) find the best sample size to assure the probability of rejecting a sample when the true prob. is 7% is 90% and justify your methodology choice?

3.) When the customer's primary interest is in the quality of individual items, how do u explain the popularity of mean control chart?

4.) Construct a cumsum control chart for following and state all assumptions made.

3,7,8,11,10,14,17

how are cumsum charts, diff. than EWMA than moving range charts?

Thank You for the Help

PLEASE HELP

1.) find the mean control chart if 50 samples, each of size 25 are taken with the results: mean 8, sample variance 4

If mean moves to 9, what is the prob. that there are no more than 3 Nonconf. in the next 5 samples

2.) find the best sample size to assure the probability of rejecting a sample when the true prob. is 7% is 90% and justify your methodology choice?

3.) When the customer's primary interest is in the quality of individual items, how do u explain the popularity of mean control chart?

4.) Construct a cumsum control chart for following and state all assumptions made.

3,7,8,11,10,14,17

how are cumsum charts, diff. than EWMA than moving range charts?

Thank You for the Help