The Following Data Represent the Number of Cars Passing Through $\begin{array} { l l l l l l l l l l l l l l l } 38 & 39 & 37 & 37 & 44 & 38 & 41 & 38 & 39 & 35 & 42 & 39 & 43 & 37 & 41 \end{array}$

question 69

Multiple Choice

The following data represent the number of cars passing through a toll booth during a certain time period over a number of days.

$\begin{array} { l l l l l l l l l l l l l l l } 38 & 39 & 37 & 37 & 44 & 38 & 41 & 38 & 39 & 35 & 42 & 39 & 43 & 37 & 41 \end{array}$

Calculate and interpret sample variances and confidence intervals for population variances.

Understand and apply the concept of degrees of freedom in the context of t-tests.

Design experiments resulting in paired or independent data and recommend appropriate analytical methods.

Analyze and synthesize information from statistical experiments to make informed conclusions.