Q52. - Algebra 1

Question

A race car driver records the finishing times for recent practice trials.

What is the meantime, in seconds, for the trials?

Step-by-Step Solution

Answer

Meantime, in seconds, for the trials is $5.02\text{ seconds}$.

Step 1. Understanding means value.

The mean value of a set of data points is the sum of those data points divided by the number of data points in the set

For example, a mean of  3,4,5 is 

$\begin{array}{l}\frac{3+4+5}{3}\\ =\frac{12}{3}\\ =4\end{array}$.

Step 2. Fining the mean.

The 5 Data points given are: 

 $5.09,5.10,4.95,4.91,5.05$

Its mean can be calculated as shown:

 $\begin{array}{l}X=\frac{5.09+5.10+4.95+4.91+5.05}{5}\\ X=\frac{25.1}{5}\\ X=5.02\text{ seconds}\end{array}$

Step 3. Interpret the result.

Since the mean is 5.02 meantime, in seconds, for the trials is 5.02.