Straighterline Introduction to Statistics Final Exam Questions with Correct Verified Detailed Answers latest version

Straighterline Introduction to Statistics
Final Exam Questions with Correct Verified
Detailed Answers latest version


Interquartile Range (IQR) --- correct answer ---Middle 50% of the

data

IQR= Q3-Q1




Finding an outlier using IQR --- correct answer ---An observation is

considered a suspected outlier if it is:

less than Q1 - 1.5(IQR), or

more than Q3 + 1.5(IQR).




Interpreting scatterplots:

1. positive relationship displays as

2. negative relationship displays as --- correct answer ---1. upward

slope

2. downward slope




Interpreting Scatterplots:

, How to tell if a linear relationship is strong or weak --- correct

answer ---closer to -1 is a strong negative linear relationship

closer to +1 is a strong positive linear relationship

close to 0 is a weak linear relationship




Interpreting Scatterplots:

Linear regression --- correct answer ---Finding the line that best fits

the pattern of the linear relationship (the line that describes how the

response variable linearly depends on the explanatory variable




Interpreting Scatterplots:

Least Squares Regression Line --- correct answer ---Has the smallest

sum of squared vertical deviations of the data points from the line.




Interpreting Scatterplots:

Extrapolation --- correct answer ---Prediction for ranges of the

explanatory variable that are not in the data; is not reliable and

should be avoided