# Two group t tests are helpful select one a when we

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Two-group t-tests are helpfulSelect one:a. When we want to test whether differences we observe in a ordinalvariable across two samples are likely to reveal real differences in theunderlying populationsb.When we want to test whether differences we observe in a continuousvariable across two samples are likely to reveal real differences in theunderlying populationsc. When we want to describe differences in a categorical variable betweentwo samplesd. When we want to test whether differences we observe in a discretevariable across two samples are likely to reveal real differences in theunderlying populations
For the p-value associated with the F-statistic, a value of less than 0.05indicatesSelect one:
In a regression analysis with multiple independent variables, what is b0?Select one:
Regression analysis was conducted between \$ sales (y) and \$ advertising(x) across all the branches of a major multinational corporation. Thefollowing regression function was obtained. y-hat = 5000 + 7x. If theadvertising budgets of two branches of the corporation differ by \$30,000,then what will be the predicted difference in their sales?Select one:
b. \$5000c.\$210,000d. \$70000Which of these points reflect the assumption of multicollinearity?Select one:a. The variance across your variables must be equalb. There must not be any extreme scores in the data setc. Data must be normally distributed and not skewedd.One independent variable ought not to be strongly predicted by another
In regression analysis, the variable that is used to explain the change inthe outcome of an experiment or some other process, is calledSelect one:

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