Select the correct answer.

A survey was given to randomly selected employees who drive to work. Each employee was asked to report if they had received a speeding ticket on their morning commute to work any time in the last year. The results are in the table.

[tex]\[
\begin{tabular}{|l|l|l|l|}
\hline & Speeding Ticket & No Speeding Ticket & Total \\
\hline
\begin{tabular}{l}
Regularly Leave for \\
Work Early or On Time
\end{tabular} & 5 & 81 & 86 \\
\hline
\begin{tabular}{l}
Regularly Leave for \\
Work Late
\end{tabular} & 56 & 9 & 65 \\
\hline
Total & 61 & 90 & 151 \\
\hline
\end{tabular}
\][/tex]

Which conclusion can be made from the data?

A. The probability of an employee receiving a speeding ticket given that they regularly leave for work early or on time is less than the probability of an employee not receiving a speeding ticket given that they regularly leave for work late.

B. The probability of an employee receiving a speeding ticket given that they regularly leave for work late is the same as the probability of an employee not receiving a speeding ticket given that they regularly leave for work early or on time.

C. Regularly leaving for work late and receiving a speeding ticket are independent events.

D. Employees who regularly leave for work late are less likely to receive a speeding ticket than employees who regularly leave for work early or on time.



Answer :

To solve this problem, let's calculate the relevant probabilities based on the data provided in the table.

1. Probability of an employee receiving a speeding ticket given that they regularly leave for work early or on time:

- Number of employees who leave early or on time and received a speeding ticket = 5
- Total number of employees who leave early or on time = 86

The probability is calculated as follows:

[tex]\[ P(\text{Ticket | Early}) = \frac{\text{Number of employees with ticket who leave early}}{\text{Total number of employees who leave early}} \][/tex]

[tex]\[ P(\text{Ticket | Early}) = \frac{5}{86} \approx 0.0581 \][/tex]

2. Probability of an employee not receiving a speeding ticket given that they regularly leave for work late:

- Number of employees who leave late and did not receive a speeding ticket = 9
- Total number of employees who leave late = 65

The probability is calculated as follows:

[tex]\[ P(\text{No Ticket | Late}) = \frac{\text{Number of employees without ticket who leave late}}{\text{Total number of employees who leave late}} \][/tex]

[tex]\[ P(\text{No Ticket | Late}) = \frac{9}{65} \approx 0.1385 \][/tex]

3. Comparison of Probabilities:

- From our calculations, we have:
- [tex]\( P(\text{Ticket | Early}) \approx 0.0581 \)[/tex]
- [tex]\( P(\text{No Ticket | Late}) \approx 0.1385 \)[/tex]

Comparing these two probabilities, we find that:

[tex]\[ P(\text{Ticket | Early}) < P(\text{No Ticket | Late}) \][/tex]

Based on the comparison, we can make the following conclusion:

A. The probability of an employee receiving a speeding ticket given that they regularly leave for work early or on time is less than the probability of an employee not receiving a speeding ticket given that they regularly leave for work late.

So, the correct conclusion is Option A.