Let's analyze the given data carefully to determine the probability of earning a score of 3 or higher on the standardized test.
The provided table shows the scores and their corresponding probabilities:
[tex]\[
\begin{array}{|c|c|}
\hline
\text{Score} & \text{Probability} \\
\hline
1 & 0.18 \\
2 & 0.20 \\
3 & 0.26 \\
4 & 0.21 \\
5 & 0.15 \\
\hline
\end{array}
\][/tex]
We need to find the probability of earning a score of 3 or higher. This means we need to consider the scores 3, 4, and 5.
To solve this, we add the probabilities of these scores:
[tex]\[
\begin{aligned}
\text{Probability of scoring 3} &= 0.26 \\
\text{Probability of scoring 4} &= 0.21 \\
\text{Probability of scoring 5} &= 0.15 \\
\end{aligned}
\][/tex]
Next, we sum these probabilities:
[tex]\[
0.26 + 0.21 + 0.15 = 0.62
\][/tex]
Therefore, the probability of earning a score of 3 or higher is [tex]\(0.62\)[/tex].
The correct answer is: 0.62
