Two group t tests are helpful select one a when we

Two-group t-tests are helpful
Select one:
a. When we want to test whether differences we observe in a ordinal
variable across two samples are likely to reveal real differences in the
underlying populations
b. When we want to test whether differences we observe in a continuous
variable across two samples are likely to reveal real differences in the
underlying populations
c. When we want to describe differences in a categorical variable between
two samples
d. When we want to test whether differences we observe in a discrete
variable across two samples are likely to reveal real differences in the
underlying populations
For the p-value associated with the F-statistic, a value of less than 0.05
indicates
Select 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. The
following regression function was obtained. y-hat = 5000 + 7x. If the
advertising budgets of two branches of the corporation differ by $30,000,
then what will be the predicted difference in their sales?
Select one:

b. $5000
c. $210,000
d. $70000
Which of these points reflect the assumption of multicollinearity?
Select one:
a. The variance across your variables must be equal
b. There must not be any extreme scores in the data set
c. Data must be normally distributed and not skewed
d. One independent variable ought not to be strongly predicted by another
In regression analysis, the variable that is used to explain the change in
the outcome of an experiment or some other process, is called
Select one: