Question

Frequency tables, histograms, and basketball wins: Here are the number of wins for the 30 U.S. National Basketball Association (NBA) teams for the 2012–2013 NBA season. 60 44 39 29 23 57 50 43 37 27 49 42 37 29 19 56 51 40 33 26 48 42 31 25 18 53 44 40 29 23 Create a grouped frequency table for these data. Create a histogram based on the grouped frequency table. Write a summary describing the distribution of these data with respect to shape and direction of any skew. Here are the numbers of wins for the 8 teams in the National Basketball League (NBL) of Canada. Explain why we would not necessarily need a grouped frequency table for these data. 26 33 20 22 20 18 19 2

Answer 1

Create a grouped frequency table for these data.

value	Total
18	1
19	1
23	2
25	1
26	1
27	1
29	3
31	1
33	1
37	2
39	1
40	2
42	2
43	1
44	2
48	1
49	1
50	1
51	1
53	1
56	1
57	1
60	1

Create a histogram based on the grouped frequency table.

Write a summary describing the distribution of these data with respect to shape and direction of any skew.

If the skewness is between -0.5 and 0.5, the data are fairly symmetrical. If the skewness is between -1 and – 0.5 or between 0.5 and 1, the data are moderately skewed. If the skewness is less than -1 or greater than 1, the data are highly skewed.

so data is not skewed and is symmetrical.