Statistics and Research Methods for Business Decision Making
Statistics and Research Methods for Business Decision Making Question 2.
The following data are the 40 days umbrella sales from a store. (8 Marks)
| 63 | 74 | 42 | 65 | 51 | 54 | 36 | 56 | 68 | 57 |
| 62 | 64 | 76 | 67 | 79 | 61 | 81 | 77 | 59 | 38 |
| 84 | 68 | 71 | 94 | 71 | 86 | 69 | 75 | 91 | 55 |
| 48 | 82 | 83 | 54 | 79 | 62 | 68 | 58 | 41 | 47 |
- Construct a frequency distribution and a relative frequency distribution for the data.
(2 marks)
- Construct a cumulative frequency distribution and a cumulative relative frequency distribution for the data. (2 marks)
- Plot a relative frequency histogram for the data. (1 mark)
- Construct an ogive for the data. (1 mark)
- What proportion of the grades is less than 60? (1 mark)
| Classes Frequency Relative Frequency Cumulative Frequency Cumulative Relative Frequency 30 – 40 40 – 50 50 – 60 60 – 70 70 – 80 80 – 90 90 – 100 |
What proportion of the grades is more than 70? (1mark) Use following class intervals to answer the above questions
