Blog

In the Excel scatterplot shortcut described in Module 8, which trendline type should be selected for the module’s regression approach?

The null hypothesis for testing correlation is H0: ρ = __________.

The Excel function used for the simplest two-variable correlation calculation is =__________(array1,array2).

For small-sample correlation hypothesis tests, Module 8 uses degrees of freedom equal to n minus __________.

According to Module 8, the null hypothesis for testing a correlation is always:

A student says, “The standard error in regression is the same thing as the slope coefficient, so it tells us how much y changes when x increases by one unit.” Based on Module 8, why is this statement incorrect?

Given a regression model Loyalty=4.290+1.095(Price)+1.637(SR) If price decreases by 0.10 and SR increases by 0.20, what is the net predicted change in loyalty? (enter a number value with 3 decimals)

A correlation of -0.90 is stronger than a correlation of +0.80, even though it is in the opposite direction.

Module 8 suggests that good independent variables in multiple regression should generally be:

A correlation between advertising spending and sales revenue is calculated as r = 0.00. According to Module 8, what does this value indicate?