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GSCM 326 Week 6 Quiz (Updated)

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GSCM 326 Week 6 Quiz (Updated)

1. (TCO 11) The component of statistical methodology that includes the collection, organization, and summarization of data is called (Points : 5)

descriptive statistics.
probability distribution.
statistical inference.
predictive statistics.

Question 2.2. (TCO 11) The process of developing predictions about the future based on historical data is (Points : 5)

predictive statistics.
descriptive statistics.
inference statistics.
random inference.

Question 3.3. (TCO 11) A typical group is selected from the population, and a random sample is taken from within the group. This is an example of _____ sampling. (Points : 5)

simple random
stratified
cluster
judgment

Question 4.4. (TCO 11) Calculating the variance for 10 lengths of steel is an example of which of the following? (Points : 5)

Descriptive statistics
Statistical inference
Predictive statistics
Analytical statistics

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Question 5.5. (TCO 11) If the process mean and variance do not change over time, the process is considered to be (Points : 5)

in statistical control.
normally distributed.
stable.
capable.

Question 6.6. (TCO 12) _____ are special types of data collection forms in which the results can be interpreted on the form directly without additional processing. (Points : 5)

Check sheets
Run charts
Data sheets
Control charts

Question 7.7. (TCO 12) Data such as production volume, cost, and customer satisfaction indexes are often plotted on a _____, which displays the data over time. (Points : 5)

check sheet
control chart
run chart
SIPOC diagram

Question 8.8. (TCO 12) Attribute data (Points : 5)

require a smaller sample size than variable data.
can be measured in inches, pounds, feet, and so forth.
are more efficient than variable data.
are easier to collect than variable data.

Question 9.9. (TCO 12) An alternative to using the R-chart is the (Points : 5)

NP-chart.
S-chart.
C-chart.
P-chart.

Question 10.10. (TCO 12) Process capability calculations make little sense if the process (Points : 5)

data were taken over a period of time.
is not in statistical control.
variations are due to common causes.
is not initiated.

(TCO 12) Six samples of subgroup size 7 (n= 7) were collected. Determine the upper control limit (UCL) for an X-bar chart if the mean of the sample averages is 4.7 and the mean of the sample ranges is 0.35.Factors for calculating control limits
n            A2          D3           D4
2             1.880    0             3.267
3             1.023    0             2.574
4             0.729    0             2.282
5             0.577    0             2.114
6             0.483    0             2.004
7             0.419    0             1.924       (Points : 10)

(TCO 12) Twenty samples of subgroup size 2 (n= 2) were collected for a variable measurement. Determine the upper control limit (UCL) for an R-chart if the mean of the sample ranges equals 4.4.Factors for calculating control limits
n             A2           D3           D4
2              1.880     0              3.267
3              1.023     0              2.574
4              0.729     0              2.282
5              0.577     0              2.114
6              0.483     0              2.004 (Points : 10)

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GSCM 326 Week 6 Quiz (Updated)

GSCM 326 Week 6 Quiz (Updated)

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