Exhibit 7-3: a Researcher Is Examining the Effects of a Computer-Based

question 46

Multiple Choice

Exhibit 7-3: A researcher is examining the effects of a computer-based training program designed to teach algebra.The researcher randomly selects subjects for two groups and gives one group the computer training and the other standard teaching methods to see if the results of the two methods differ.The following scores are from the subjects' final test.
$\begin{array}{ll}{\text {CBT }}{} & \text {Control }\\ 52 & 65 \\ 55 & 45 \\ 56 & 47 \\ 53 & 46 \\ 50 & 47 \\ 49 & 33 \\ 52 & 39 \\ 53 & 49\end{array}$
-Refer to Exhibit 7-3.The researcher can conclude that:

• A) there is no statistically significant evidence that students who use the computer training will do any better than students using the standard methods.
• B) every student who used the computer program scored higher than any student who did not use the program.
• C) there is a statistically significant difference between scores of those who had computerized algebra training and those who had standard teaching methods.
• D) both b and c

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Definitions:

Notation P(A)

In probability theory, a notation representing the probability of event A occurring.

Precision

The quality of being exact, accurate, and carefully defined.

Probability

The measure of the likelihood that an event will occur.

Probability

A numerical expression between 0 and 1 indicating the probability of an event happening.