Summarizing Quantitative Data

Which of the following is NOT a measure of center?

• mean

• median

• range

• mode

Which of the following is NOT a measure of spread (variability)?

• median

• range

• interquartile range

• standard deviation

Tags

CCSS.6.SP.A.3

Which set of rules should you use to find the boundaries when identifying outliers?

• Q1 + 1.5 (IQR)

  Q3 + 1.5 (IQR)

• Q1 - 1.5 (IQR)

  Q3 + 1.5 (IQR)

• Q1 - 1.5 (IQR)

  Q3 - 1.5 (IQR)

• Q1 + 1.5 (IQR)

  Q3 - 1.5 (IQR)

To find the average of a set of numbers, add up all the items and divide by...

• 2.
• The smallest number
• The largest number
• The number of items in the set.

Dr. David is a dentist. He needs to report on the average (Mean) number of cavities he found during exams today.

Here are the number of cavities his 7 patients had today:

1, 0, 1, 5, 0, 3, 4

What is the average number of cavities?

• 14

• 2

• 7

• 1

Find the first quartile, median, third quartile, and interquartile range of the data.

32, 53, 72, 66, 47, 54, 49, 67, 71

• First Quartile: 49

  Median: 54

  Third Quartile: 67

  IQR: 18

• First Quartile: 48

  Median: 54

  Third Quartile: 69

  IQR: 21

• First Quartile: 48

  Median: 54

  Third Quartile: 69

  IQR: 22

• First Quartile: 49

  Median: 54

  Third Quartile: 69

  IQR: 20

Which of the following statements is true in regards to outliers in this data set:

23, 22, 25, 16, 27, 43, 72, 29, 40, 35

• Lower Boundary: -2.5

  Upper Boundary: 65.6

  No outliers.

• Lower Boundary: -2.5

  Upper Boundary: 65.6

  72 is an upper outlier

• Lower Boundary: 23

  Upper Boundary: 40

  16 and 72 are outliers

• Lower Boundary: 23

  Upper Boundary: 40

  72 is an upper outlier

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 1
• Set 2
• Set 3
• Set 4

Todd bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142.

Which is the correct interpretation of the standard deviation?

• Todd's average bowling score was 156.

• On average, Todd's scores deviated approximately 22.61 points from the mean of 156.

• The middle 50% of bowling scores spread 34 points.

• On average, Todd's scores deviated approximately 34 points from the mean of 156.

What does standard deviation measure?

• The average distance the values are from the mean.

• The number that appears most often.

• The largest number - the smallest number

• The difference between the upper and lower quartiles.