## HI6007 Statistics and Research Methods for Business Decision Making

Question 2.

The following data are the 40 days of 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

(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

2. What proportion of the grades is more than 70?                                      (1mark) Use the following class intervals to answer the above questions

Tags: , , , ,