The data below shows commuting times (in minutes) from a random sample of 32 employees who work at a company.

x = c(53,50,55,51,55,55,53,44,39,47,49,52,56,51,46,50,54,45,51,50,58,50,47,56,45,55,52,52,47,44,51,18)

Data set, ctime.csv, can be downloaded.

  1. Are there outliers?

    Yes No

  2. Find the third quartile.

    $\displaystyle {{109}\over{2}}$ $\displaystyle {{105}\over{2}}$ $\displaystyle {{213}\over{4}}$

  3. Find the description which best fits the shape of distribution.

    symmetric right-skewed left-skewed

  4. Find the sample mean.

    51.0 49.4 50.5

  5. Find the first quartile.

    47 46 48


Department of Mathematics
Last modified: 2025-08-19