There are 100 points on this test. Show all your work so that I can award partial credit if necessary. Put your names and answers on the separate blank sheets I will pass out.
(50 pts total) All parts of this problem refer to the following dataset.
x  1.0  2.0  3.0 
y  30  60  80 
(10 pts) Compute the mean and standard deviation for x
(10 pts) Compute the mean and standard deviation for y.
(10 pts) Compute the correlation of the two variables.
(5 pts) Describe the strength and direction of the association between x and y.
(10 pts) Find the equation of the leastsquares regression line, using x as the explanatory variable and y as the response variable
(5 pts) Use the equation from the previous question to predict the y value for an x value of 2.3.
(20 pts total—5 points each part) The following table of statistics,
boxplot, and normal quantile plot were created in CrunchIt to
summarize a dataset of the number of words spoken per day by
the men in a study of speech patterns of 42 women and 37 men.

Is the distribution of the WordsPerDay variable roughly normal? Support your answer.
Is the distribution of the WordsPerDay variable rightskewed, leftskewed, or not skewed? Support your answer.
Are there any outliers, according to the 1.5 * IQR rule?
Which is a better measure of center for this data set—the mean or the median?
What is the zscore for x = 15,000 words?
Use Table A from the textbook to calculate the percentage of college professors that speak 15,000 words per day or more.
Summarize the data in a twoway table
What is the marginal distribution of rarely using a
calculator when doing homework?