Use y=faithful$eruptions; x=faithful$waiting to set the eruption
durations and waiting time between eruptions of the R data set
faithful in objects y and x, respectively, and complete the
following parts.
1. Make an scatterplot of the (x,y) data. Does it support the
assumption that the data follows the simple linear regression
model? (Include the plot with your answer.)
2. Fit the simple linear regression model and construct a 90% CI
for: a) the slope, and b) the mean eruption duration...