Name________________________ Sec_______ ID__________

RANGE, SD, AND VARIANCE

RIDDLE: What did the control tower say to the jet that was on fire?

Directions: To find the answer to the riddle, write the answers to the problems on the lines. The word in the solution section beside the answer to the first problem is the first word in the answer to the riddle, the word beside the answer to the second problem is the second word, and so on.

Use "high minus low plus one" to compute the range. Round the SD to two decimal places. Round the variances to one decimal place.

Group E's scores: 0, 11, 7, 7, 8, 11, 5, 10

Group F's scores: 2, 2, 25, 9, 25, 9, 15, 5, 20

Group G's scores: 8, 9, 9, 10, 12, 10, 12, 12, 12, 11

1. What is the range of group E's scores?__________

2. What is the SD of group E's scores?__________

3. What is the variance of group E's scores?__________

4. What is the range of group F's scores?__________

5. What is the SD of group F's scores?__________

6. What is the variance of group F's scores?__________

7. What is the range of group G's scores?__________

8. What is the SD of group G's scores?__________

9. What is the variance of group G's scores?__________

SOLUTION SECTION:

12 (REPEAT) 10 (LAS VEGAS) 27.404 (WE) 3.42 (AFTER) 5 (ART)

24 (OUR) 9.39 (BROKE) 11.7 (ME) 1.8 (POKER) 19 (SORRY)

2.9 (SAD) 4 (FRIENDLY) 1.43 (IN) 2.0 (HEAVEN) 78.01 (IS)

7.2 (GUM) 75.0 (WHO) 8.66 (FATHER) 675.55 (CARDS) 14.32 (BE)

Write the answer to the riddle here, putting one word on each line:

__________ ___________ __________: "____________ ____________ ____________ ________

__________ ___________..."