A team of business analysts observe operations at a retail center. They count the number of customers visiting this center within 20 minute periods.The following table shows 33 samples

25	73	13	164	35	47	20	67	165	170	30
42	67	100	168	183	103	61	141	8	120	50
189	191	74	26	118	165	200	145	62	40	162

1. You are asked to summarize and create a frequency distribution for this data. Using the 2^k>n rule, what is the minimum number of classes that can create for this data?
   1. 4
   2. 5
   3. 6
   4. 7

1. Assuming six classes, what is the estimated class width?
   1. 24
   2. 28
   3. 32
   4. 36

1. What is the standard deviation of this sample?
   1. 60.27
   2. 61.48
   3. 62.44
   4. 80.45