Standard Deviation

Front

What does this symbol represent? Options: Standard Deviation, Variance, Mean Absolute Deviation, Sigma

Back

Standard Deviation

Front

What does standard deviation represent?

Back

How spread out each data value is from the mean.

Front

Which data set has the largest standard deviation?
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}

Back

Set 1

Front

Which set of data probably has the points closest to the 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

Back

Set 3

Front

Which set of data probably has the points furthest to the 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

Back

Set 2

Front

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?

Back

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.

Front

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.

Back

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.

Front

The chart on the left shows the statistics on test scores in period 1 and period 5. Which is true? Options: 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.

Back

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

Front

The ages of the employees at Company A tend to be closer together, than those at Company B.

Back

True

Front

The ages of the employees at which company tend to be lower than the other?

Back

Company A