Question

In a study, researchers compared the variability in product of a particular piece of equipment to a known analytic capability to decide whether product consistency could be improved. The following data were obtained for 10 batches of product. Preliminary test results suggest the data are normally distributed and that s=0.587. Construct a 95% confidence interval for the process variation of the piece of equipment under consideration.

30.1 |
29.5 |
30.1 |
30.2 |
28.5 |
29.7 |
29.1 |
30.4 |
30.1 |
29.5 |

The 95% confidence interval is from _ to _.

(Round to three decimal places as needed.)

Answer #1

In a study, researchers compared the variability in product of
a particular piece of equipment to a known analytic capability to
decide whether product consistency could be improved. The following
data were obtained for 10 batches of product. Preliminary test
results suggest the data are normally distributed and that s=0.386.
Construct a 98% confidence interval for the process variation of
the piece of equipment under consideration.
29.9
29.2
30.1
29.5
30.1
29.5
29.9
29.8
30.2
29.1
The 98% confidence interval...

In a study, researchers compared the variability in product of
a particular piece of equipment to a known analytic capability to
decide whether product consistency could be improved. The following
data were obtained for 10 batches of product. Preliminary test
results suggest the data are normally distributed and that s=0.567.
Construct a 90 confidence interval for the process variation of
the piece of equipment under consideration.
29.7
30.3
29.3
30.1
29.1
28.9
28.9
29.7
29.4
28.5
The 90% confidence interval...

In a study, researchers compared the variability in product of
a particular piece of equipment to a known analytic capability to
decide whether product consistency could be improved. The following
data were obtained for 10 batches of product. Preliminary test
results suggest the data are normally distributed and that s=0.558.
Construct a 980% confidence interval for the process variation of
the piece of equipment under consideration.
29.7
28.6
29.7
30.1
29.2
29.4
29.2
28.9
30.5
29.4
The 90% confidence interval...

1) What are some indicators that there are assignable
causes for variation in a process?
I.Process capability.
II. Data patters outside of the control limits.
III. Data patters within the control limits.
IV. Points randomly falling above and below the control chart
center line.
a.
II and III
b.
II, III, IV
c.
I, II, IV
d.
I, II, III, IV
2) The best quantitative tool to determine the cause for
variation in a process is:
a.
ANOVA
b.
Correllation...

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