Lesson 10-‐3 Extension HW Answers Pg. 570/ #1 – 5 (6 ques2ons) 1. Mean =
29
3. Range =
5
29.5
2. Median = 4. IQR =
2
5. Find the standard deviation of the Algebra 1 class data by completing the table and doing the calculations below it. Data value, x
Deviation from __ mean, x-x
Squared deviation, __ (x - x )2
(-1)2 = 1
28
28 - 29 = -1
30
30 - 29 = 1
12 = 1
29
29 - 29 = 0
02 = 0
26
26 - 29 = -3
31
31 - 29 = 2
22 = 4
30
30 - 29 = 1
12 = 1
__
Mean of squared deviations = Standard deviation ≈
1.6
2. 6
(-3)2 = 9