Data Analysis

Mean

100

Define Mean

The average

200

Find the mean of 19, 13, 15, 25, and 18

18

300

Find the mean: 18, 24, 17, 21, 24, 16, 29, 18

20.875

400

Cory has received the following grades this term: 75, 87, 90, 88, 79. If he wishes to earn an 85 average, what must he score on his final test?

91

500

Chad recently launched a new website. In the past six days, he has recorded the following number of daily hits: 37, 29, 37, 56, 45, 38. He is hoping at week’s end to have an average number of 40 hits per day. To achieve this, how many hits must he have on the final day of the week?

38

Median

100

Define Median

The middle number

200

Find the median of 15, 19, 20, 29, 36

20

300

Find the median of 28, 37, 67, 75, 81, 83,

71

400

Find the median: 55, 47, 38, 66, 56, 64, 44, 63, 39

55

500

Brian was comparison shopping for DVD players. He decided he wanted to purchase a DVD player that was in the middle of the price ranges. The prices he was quoted include the following: $59.99, $219.99, $79.99, $84.99, $159.99, $109.99, $35.99. Which DVD player did Brian select?

$84.99

Mode

100

Define Mode

The number that appears the most

200

Find the mode of 15, 21, 26, 25, 21, 23, 28, 21

21

300

Find the mode of 12, 15, 18, 26, 15, 9, 12, 27

12 AND 15

400

Find the mode of 4, 8, 15, 21, 23

No mode

500

BONUS TIME

500 points

Range and IQR

100

Find the range of 15, 21, 26, 25, 21, 23, 28, 21

28 - 15 = 13

200

Define Range

Highest score minus lowest score

300

Find the IQR of:

12, 14, 14, 16, 16, 17, 18

IQR = 17 - 14 = 3

400

How do you calculate the IQR?

Upper quartile - lower quartile

500

Find the IQR of:

12, 14, 14, 15, 16, 16, 17, 18

IQR = 16.5 - 14 = 2.5

Mixed Bag

100

Find the outlier: 20, 15, 18, 19, 30, 21

30

200

POW

Lose 200 points

300

WOO HOO

Take 300 points from the team in first place

400

Which calculation from range and IQR is least affected by an outlier?

IQR

500

Which calculation from mean, median and mode is most affected by an outlier?

Mean