# TCAP Success ALGEBRA 2 EOC Chapter 18

### TCAP Success ALGEBRA 2 EOC Chapter 18 Sample

1 pt DOK: 2
2.

A random sample of 7 students had the following scores on a quiz: 8 points; 9 points; 8 points; 6 points; 7 points; 6 points; 2 points. Which of the following is the best approximation of the standard deviation of the sample of quiz scores?

1 pt DOK: 2
4.

A data set consists of 8 values and has a mean of 227.5 gallons. Seven of the data values are as follows: 120 gallons; 280 gallons; 215 gallons; 325 gallons; 200 gallons; 135 gallons; 305 gallons. What is the 8th data value in the set?

1 pt DOK: 1
6.

Which of the following sets of numbers has a median of 42?

1 pt DOK: 3
8.

You are told that the interval that is most likely to contain all the people who walk their dog every day is between 13.5% and 22.1%. What is the margin of error, and what sample size is needed to obtain that margin of error?

1 pt DOK: 2
9.

In a recent survey of 160 people, 31% said that they spend at least \$50 a day on everyday expenses. What is the margin of error for this survey?