These are the numbers of wins for the 30 NBA teams for the 2004-2005 NBA season.
45 43 42 33 33 54 47 44 42 30 59 45 36 18 13 52 49 44 27 26 62 50 37 34 34 59 58 51 45 18
I am supposed to create a grouped frequency table for this data.
I found my range is 62-12=49
I decided that I want to create 7 groups 49/7=7
However when I created my first column, class interval I am missing a number. this is what I got:
13- 19,20-26,27-33,34-40,41-47,48-54,55-61
Please tell me what I am doing incorrect.
well you doing it sorrectly now just one more interval to it. 62-68. and no worries ... the frequency will be 1.
hope you get it.
:)
But that wouldn't become into 8 groups instead of 7?
Last question what type of research question could possibly arise from this data?
Although you might want 7 intervals, there is no magic number. There could be 6 or 8 intervals, if you want.
Are there any characteristics that relate to the most winning teams in contrast to the least winning teams? League? Area of the country? Salaries? Something else?
I hope this helps a little more. Thanks for asking.
It looks like you made an error in calculating the class intervals for your grouped frequency table. Let's go through the correct process step by step:
1. Find the range of the data: The range is the difference between the maximum and minimum values. In this case, the maximum value is 62 and the minimum value is 13. So, the range is 62 - 13 = 49.
2. Determine the number of groups: You decided to create 7 groups, which is a good choice.
3. Calculate the width of each group: To determine the width of each group, divide the range by the number of groups. So, 49 / 7 = 7. This means that each group should have a width of 7.
4. Construct your class intervals: Start with the minimum value and add the width to it successively to get the upper limits of each class interval. Here's how you should construct the class intervals:
- 13 - 19
- 20 - 26
- 27 - 33
- 34 - 40
- 41 - 47
- 48 - 54
- 55 - 61
- 62 (This last interval can either be left open-ended or you can include the maximum value.)
So, your class intervals should be:
13-19, 20-26, 27-33, 34-40, 41-47, 48-54, 55-61, 62