How Late Is the 8:15 Bus? — medium Descriptive Statistics problem | Incognition

How Late Is the 8:15 Bus?

Descriptive StatisticsMedium+20 XP+20

How Late Is the 8:15 Bus?

A commuter records how many minutes late her bus arrives on each of $12$ consecutive working days. Rather than writing out all twelve values, she tallies them:

Minutes late ( $x$ )	Number of days ( $f$ )
$0$	$2$
$1$	$4$
$2$	$3$
$3$	$2$
$5$	$1$

Treat these $12$ days as the entire population.

What is the population variance of the delay times?

Answer in $\text{minutes}^2$ , rounded to two decimal places.

Hints

minutes²

How Late Is the 8:15 Bus?

How Late Is the 8:15 Bus?

Hints

Solve it to unlock the solution

Variance Explorer