TCAP Data Analysis 5

Question 1

A two-way table shows that 15 boys and 20 girls prefer science, while 10 boys and 5 girls prefer art. How many total students prefer science?

Accepted Answer

35

Answer

Total science = 15 boys + 20 girls = 35 students.

Question 2

A data set has a mean of 30 and a median of 25. What does this suggest about the distribution?

Accepted Answer

The data is skewed right

Answer

When the mean is greater than the median, the distribution is skewed right (pulled up by high values).

Question 3

A student wants to find out which lunch option is most popular among 300 students. She surveys every 10th student in line. What type of sampling is this?

Accepted Answer

Systematic sampling

Answer

Selecting every nth person from a list or sequence is called systematic sampling.

Question 4

The dot plot shows values: 3, 3, 4, 5, 5, 5, 6, 7. If the value 7 is removed, how does the mean change?

Accepted Answer

It decreases

Answer

Removing a high value (7) lowers the sum and thus decreases the mean.

Question 5

Which statement best describes a negative correlation on a scatter plot?

Accepted Answer

As x increases, y decreases

Answer

A negative correlation means that as one variable increases, the other decreases, showing a downward trend.

(TCAP) Tennessee Comprehensive Assessment Program Practice Test

(TCAP) Tennessee Comprehensive Assessment Program Practice Test

TCAP Data Analysis 5