Are people with bigger brains more intelligent? Forty college students volunteered to participate in a study which examined brain size (measured as 1000's of pixels counted in a brain scan), and IQ scores (measured in points). A scatterplot of the data is shown below.
-Below is a picture of a simulated null distribution of correlation coefficients created using the Corr/Regression applet. How would you use this distribution to calculate the p-value?
A) Find the proportion of simulated correlation coefficients greater than zero.
B) Find the proportion of simulated correlation coefficients as far away from zero or further than the one observed.
C) Find the proportion of simulated correlation coefficients as small or smaller than the one observed.
D) Find the proportion of simulated correlation coefficients as large or larger than the one observed.

Question

Are people with bigger brains more intelligent? Forty college students volunteered to participate in a study which examined brain size (measured as 1000's of pixels counted in a brain scan), and IQ scores (measured in points). A scatterplot of the data is shown below. 
-Below is a picture of a simulated null distribution of correlation coefficients created using the Corr/Regression applet. How would you use this distribution to calculate the p-value? 
A) Find the proportion of simulated correlation coefficients greater than zero. 
B) Find the proportion of simulated correlation coefficients as far away from zero or further than the one observed. 
C) Find the proportion of simulated correlation coefficients as small or smaller than the one observed. 
D) Find the proportion of simulated correlation coefficients as large or larger than the one observed.

Quizplus · Accepted Answer

The Answer of Are people with bigger brains more intelligent? Forty college students volunteered to participate in a study which examined brain size (measured as 1000's of pixels counted in a brain scan), and IQ scores (measured in points). A scatterplot of the data is shown below. 
-Below is a picture of a simulated null distribution of correlation coefficients created using the Corr/Regression applet. How would you use this distribution to calculate the p-value? 
A) Find the proportion of simulated correlation coefficients greater than zero. 
B) Find the proportion of simulated correlation coefficients as far away from zero or further than the one observed. 
C) Find the proportion of simulated correlation coefficients as small or smaller than the one observed. 
D) Find the proportion of simulated correlation coefficients as large or larger than the one observed.

Are People with Bigger Brains More Intelligent? Forty College Students