Module 7 DATA1501

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By default, the variable in the ​ (a)   column is generated on the x-axis and the variable in the ​ (b)   column is generated on the ​y-axis .​. Just as with the contingency table, we generally want our ​​ (c)   variable on the x-axis and ​ (d)   variable on the y-axis. 

• first
• second
• explanatory
• response
• third
• fourth
• exclusive
• random

What does the R-squared value represent? What is it used for?

• It represents the correlation between the independent and dependent variables and is used to measure the accuracy of the regression model
• It represents the coefficient of determination and it shows the proportion of the variance in the dependent variable that is predictable from the independent variable.

• It represents the standard deviation of the residuals and is used to measure the significance of the regression coefficients
• It represents the average of the independent variable and is used to measure the spread of the data points

What is the difference between a histogram and a bar chart?

• A histogram is used to represent categorical data, while a bar chart is used for numerical data.

• A histogram is used to display continuous data with intervals, while a bar chart represents discrete categories.

• A histogram displays data using vertical bars, while a bar chart uses horizontal bars.

• A histogram shows the frequency or distribution of quantitative data, while a bar chart compares different categories or groups.

What is the x-axis title?

• Diamond Carat

• Price

• DIamond Carat vs Price

• Frequency

What is the y-axis title?

• Diamond Carat

• Price

• DIamond Carat vs Price

• Frequency

Interpret the trendline and R-squared.

The third Quartile is the value under which 75% of data points are found when arranged in increasing order.

• True

• False

Reorder the following steps to Stratifying the target variable by a categorical variable

• Paste in the appropriate column

• Add filters and sort from A to Z

• Filter down to the first category

• REMOVE THE FILTER

• Highlight and copy all target values associated with that category

What type of Variable is Regulatory Quality?

• Discrete

• Continuous

• Nominal

• Ordinal