Exercise

Bar plots with error

In the video, we saw how to incorporate error bars into our bar plot to give the viewer a sense of the uncertainty in our estimates. We used error bars of +/- 1 standard error, but it's also common to use +/- 2 standard errors since that roughly represents a confidence interval for the quantity of interest.

Instructions 1/2

XP

1
2

Add two columns to out: lower where the values are two standard errors below the means given in SleepHrsNight and upper where the values are two standard errors above the means given in SleepHrsNight.

Take Hint (-15 XP)