CSET Data Analysis & Reporting 2

Question 1

A researcher collects test scores from two different schools and wants to determine if the difference in means is statistically significant. Which test is most appropriate?

Accepted Answer

Independent samples t-test

Answer

An independent samples t-test compares the means of two unrelated groups to assess whether they differ significantly.

Question 2

Which measure of central tendency is most resistant to extreme outliers in a data set?

Accepted Answer

Median

Answer

The median is the middle value and is not affected by extreme scores, making it the most resistant measure of central tendency.

Question 3

A scatter plot shows data points clustered tightly around a line that slopes downward from left to right. This indicates:

Accepted Answer

A strong negative correlation

Answer

A tight cluster around a downward-sloping line indicates a strong negative correlation between the two variables.

Question 4

When analyzing student performance data, a teacher notices that a small group of very low scores is pulling the class average down. Which statistic would best represent the typical student performance?

Accepted Answer

Median

Answer

The median better represents typical performance when outliers skew the distribution, as it is not influenced by extreme low scores.

Question 5

In a normal distribution, approximately what percentage of data falls within two standard deviations of the mean?

Accepted Answer

95%

Answer

Approximately 95% of data in a normal distribution falls within two standard deviations of the mean, per the empirical rule.

CSET Test Practice Test

CSET Test Practice Test

CSET Data Analysis & Reporting 2