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QUIZ

9th

grade

65%

accuracy

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MARINA GIRGIS

2 years

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15 questions

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- 1. Multiple Choice1 minute1 ptWhat does this symbol represent?Standard DeviationVarianceMean Absolute DeviationSigma
- 2. Multiple Choice30 seconds5 pts
Which of the following is a measure of spread, or variability?

(select all that apply)

Interquartile Range

Standard Deviation

Mean

Median

Range

- 3. Multiple Choice1 minute1 pt
What does standard deviation represent?

How many different variations are in the data set.

How the population varies compared to the sample.

How spread out each data value is from the mean.

The range, but with a bunch of other stuff going on.

- 4. Multiple Choice5 minutes5 pts
Four data sets are shown below.

Set 1: {10, 19, 38, 50, 51}

Set 2: {5, 21, 26, 39, 51}

Set 3: {9, 38, 50, 50, 51}

Set 4: {5, 28, 28, 28, 51}

Which data set has the largest standard deviation?

Set 1Set 2Set 3Set 4 - 5. Multiple Choice5 minutes5 ptsAll of the below sets have the same mean.

Set 1-Standard Deviation=3.1

Set 2-Standard Deviation=4.9

Set 3-Standard Deviation=1.7

Set 4-Standard Deviation=3.2

Which set of data probably has the points closest to the mean?1234 - 6. Multiple Choice5 minutes5 pts
All of the below sets have the same mean.

Set 1-Standard Deviation=3.1

Set 2-Standard Deviation=4.9

Set 3-Standard Deviation=1.7

Set 4-Standard Deviation=3.2

Which set of data probably has the points furthest to the mean?

1234 - 7. Multiple Choice30 seconds5 pts
Sylvia believes that the students in Term 2 had a higher average number of minutes of exercise than Term 1 because the IQR and Standard Deviation is higher for that group of students. Do you agree?

Sylvia is correct. Since the standard deviation and IQR for Term 2 students is higher, this means that students spent more time exercising, on average, than Term 1.

Sylvia is incorrect. The standard deviation and the IQR shows that there is greater variability in the amount of time exercising for Term 2 students compared to Term 1, but it does not tell us that the group spent more time exercising than Term 1.

- 8. Multiple Choice30 seconds5 pts
The table on the right shows the statistics for the number of hours of homework per night during Term 1 and Term 2 for a group of students. What must be true?

Term 1 students spent less time on homework than Term 2, but there was more variation in the number of hours spent on the homework.

Term 2 students spent less time on homework than Term 1, but there was more variation in the number of hours spent on the homework.

Term 1 students spent less time on homework than Term 2, but there was less variation in the number of hours spent on the homework.

Term 2 students spent less time on homework than Term 1, but there was less variation in the number of hours spent on the homework.

- 9. Multiple Choice30 seconds5 pts
The chart on the left shows the statistics on test scores in period 1 and period 5. Which is true?

The average test score is higher for period 5, but the data is more spread out.

The average test score is higher for period 1, but the data is more spread out.

The average test score is higher for period 5, and the data is more consistent (closer to the mean) than period 1.

The average test score is higher for period 1, and the data is more consistent (closer to the mean) than period 5.

- 10. Multiple Choice30 seconds5 pts
The ages of the employees at Company A tend to be closer together, than those at Company B.

True

False

- 11. Multiple Choice30 seconds5 pts
The ages of the employees at which company tend to be lower than the other?

Company A

Company B

- 12. Multiple Choice1 minute5 ptsIf a bowler needs to hit exactly 6 pins, which bowler is more reliable to hit that number?Bowler ABowler BBothNeither
- 13. Multiple Choice1 minute5 ptsIf a ball needs to be hit exactly 300 ft, which batter is more reliable to hit that distance?Batter ABatter BBothNeither
- 14. Multiple Choice1 minute5 ptsIf the two batters each hit 10 balls, which batter probably hit the farthest ball and the shortest ball?Batter ABatter BBothNeither
- 15. Multiple Choice30 seconds5 pts
What does a standard deviation of 0 mean?

There is no spread of data

The spread of data is close to the mean

The data is more spread out from the mean

There is no mean

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