Question 12 A hotel chain wants to learn about the level of experience of its general managers. A random sample of 40 general managers is taken and their experience (in number of years) is recorded....

Extracted text: Question 12 A hotel chain wants to learn about the level of experience of its general managers. A random sample of 40 general managers is taken and their experience (in number of years) is recorded. The information is summarised in the following frequency table: 49 Experience Frequency Midpoint (years) 5,5- f 8,5 3 8,5 11,5 10 11,5 – 14,5 6. 13 14,5 – 17,5 12 16 17,5 - 20,5 10 19 20.5 – 23,5 4 22 The best estimate of the mean number of years of experience, rounded to two decimal places, is [1] 15,48. [2] 4,24. [3] 7,11. [4] 17,95.