For samples of 9 observations, a production process has a mean
equal to 75 and a variance equal to 25. If five samples had means
of 69, 72, 79, 81, and 79.
I. Determine the lower and upper control limits for the X-bar
control chart. The letter associated with the correct answer
is
a) 50 and 100 respectively.
b) 70 and 80 respectively.
c) 95 and 145 respectively.
d) 115 and 125 respectively.
e) None of the above
II. What is the margin of error equal to? The letter
associated with the correct answer is
a) 3
b) 5
c) 12
d) 25
e) None of the above
III. Is the central tendency of process in control?
Explain. The letter associated with the correct answer
is
a) Yes, because all sample means values fall within the control
interval for X-bar
b) Yes, because all x values fall within the control interval
for X-bar
c) No, because exactly one sample mean falls outside the control
interval for X-bar
d) No, because exactly two sample means fall outside the control
interval for X-bar
e) None of the above
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- For Samples Of 9 Observations A Production Process Has A Mean Equal To 75 And A Variance Equal To 25 If Five Samples H 1 (26.03 KiB) Viewed 30 times
QUESTION 2 The next 3 questions refer to the following situation: In the provided blank, insert the letter that corresponds to the correct answer. For example, if the correct answer is "a) 1.990 ", insert only"a" as the correct answer. For samples of s observations, a production process has a mean equal to 75 and a variance equal to 25. If five samples had means of 69, 72, 79, 81, and 79. Use the above information to answer the following questions: (always round to two decimal places): 1. Determine the lower and upper control limits for the x-bar control chart. The letter associated with the correct answer is a) 50 and 100 respectively. b) 70 and 80 respectively. c) 95 and 145 respectively. d) 115 and 125 respectively. e) None of the above 11. What is the margin of error equal to? The letter associated with the correct answer is a) 3 b) 5 c) 12 d) 25 e) None of the above II. Is the central tendency of process in control? Explain. The letter associated with the correct answer is a) yes, because all sample means values fall within the control interval for X-bar b) Yes, because all x values fall within the control interval for X-bar c) No, because exactly one sample mean falls outside the control interval for X-bar d) No, because exactly two sample means fall outside the control interval for X-bar e) None of the above