5. A) Find the 90°o confidence interval for the mean of the normal distribution: 600, 667, 654, 663, 662 B) Eight samples of size 2 wvere taken from many screws. The screw lengths (inches) were: 2 4. 6. 7 Samples 3.50 3.51 3.49 3.52 3.53 3.49 3.48 3.52 Length 1" set nd set 3.51 3.48 3.50 3.50 3.49 3.50 3.47 3 49 Assuming the population is normal with mean 3.500 and variance 0.0004, set up the control chart (LCL and UCL) for the mean. Also set up the control charts (LCL and UCL) for the variance and standard deviation assuming a = 5%.

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5. A) Find the 90°o confidence interval for the mean of the normal distribution:
000, 667, 654, 663, 662
B) Eight samples of size 2 were taken from many screws. The screw lengths (inches) were:
4
7
Samples
3.50
3.51
3.49
3.52
3.53
3.49
3.48
3.52
Length 1" set
2nd set
3.51
3.48
3.50
3.50
3.49
3.50
3.47
3 49
Assuming the population is normal with mean 3.500 and variance 0.0004, set up the
control chart (LCL and UCL) for the mean. Also set up the control charts (LCL
and UCL) for the variance and standard deviation assuming a = 5%.
Transcribed Image Text:5. A) Find the 90°o confidence interval for the mean of the normal distribution: 000, 667, 654, 663, 662 B) Eight samples of size 2 were taken from many screws. The screw lengths (inches) were: 4 7 Samples 3.50 3.51 3.49 3.52 3.53 3.49 3.48 3.52 Length 1" set 2nd set 3.51 3.48 3.50 3.50 3.49 3.50 3.47 3 49 Assuming the population is normal with mean 3.500 and variance 0.0004, set up the control chart (LCL and UCL) for the mean. Also set up the control charts (LCL and UCL) for the variance and standard deviation assuming a = 5%.
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