Question

Here are the shopping times (in minutes) for a sample of 6 shoppers at a particular grocery store. 35,34,26,27,33,31 Find the standard deviation of this sample of shopping times. Round your answer to two decimal places.

Answer 1

Answer:

3.42

Step-by-step explanation:

calculate the mean

(35+34+26+27+33+31)/6 = 186/6 = 31

35-31=  4     4² = 16

34-31=  3      3²= 9

26-31= -5     (-5)² = 25

27-31= -4     (-4)² = 16

33-31= 2        2² = 4

31-31= 0         0² = 0

                    Total: 16+9+25+16+4+0 = 70

standard deviation = √(70/6) = √11.66 =  3.4156 ≅ 3.42