Consider the Following Stem and Leaf Plot: Stem Leaf

question 72

Multiple Choice

Consider the following stem and leaf plot: Stem Leaf
1 0, 2, 5, 7
2 2, 3, 4, 4
3 0, 4, 6, 6, 9
4 5, 8, 8, 9
5 2, 7, 8
Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.) .What would the frequency be for class 30-under 40?

• A)3
• B)4
• C)6
• D)7
• E)5

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Definitions:

Stepwise Regression

A method of regression analysis in which the selection of predictive variables is carried out by an automatic procedure.

Backward Elimination

A stepwise regression technique used in statistical analysis to select significant variables by starting with all variables and successively removing the least significant ones.

Forward Selection

A stepwise regression method where variables are added one by one to the model based on their statistical significance.

Stepwise Regression

A statistical method of building a model by adding or removing predictors based on their statistical significance.