Question

Data Set B: Speeds Recorded by the State Police
53, 55, 55, 55, 57, 57, 60, 60, 62, 63, 63, 64, 67, 68, 68, 70, 72, 73
Find the mean speed of Data Set B.

Answer 1

id suggest subtracting 60 from everything and find the mean of that; then add 60 to that mean

Answer 2

(53, 55, 55, 55, 57, 57, 60, 60, 62, 63, 63, 64, 67, 68, 68, 70, 72, 73)-60

-7, -5, -5, -5, -3, -3, 0, 0, 2, 3, 3, 4, 7, 8, 8, 10, 12, 13

that sums to 42

and there are 18 data points sooo

42/18 = 2.333333

adding back 60 gives us: 62.33333

which is what we are looking for to begin with

http://www.wolframalpha.com/input/?i=mean+%7B53%2C+55%2C+55%2C+55%2C+57%2C+57%2C+60%2C+60%2C+62%2C+63%2C+63%2C+64%2C+67%2C+68%2C+68%2C+70%2C+72%2C+73%7D...