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For the data set shown here which of these statements is/are true?

A. Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples

B. A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set

C. Grade A has the lowest sample Mean of the 3 samples

D. Grade A has a higher sample Mean than Grade B

Relative to a Design of Experiments the term Collinear refers to variables being a ________________ of each other.

A. Linear combination

B. Directly parallel

C. Mirror image

D. None of the above

A Belt rearranged the location of the parts inventory for a rework station locating the most often used parts to be within hand reach of the repair person. This rearrangement resulted in quicker repair times by eliminating one of seven major elements of waste which is the Waste of __________.

A. Motion

B. Conveyance

C. Inventory

D. Waiting

A valid mathematical Regression represents all of the characteristics shown except _________________.

A. All of the standardized residuals will be within ? Standard Deviations

B. The sum of the residuals is zero

C. The residuals when plotted follow a Normal Distribution

D. Most standardized residuals are within ? Standard Deviations

E. The Residual is equal to the difference between the observed and predicted values

The class score distribution of schools in a metropolitan area is shown here along with an analysis output. Comment on the statistical significance between the Means of the two distributions. Select the most appropriate statement.

A. The two class Means are statistically different from each other

B. The two class Means statistically not different from each other

C. Inadequate information on class Means to make any statistical conclusions

D. A visual comparison shows that class Means are not statistically different