Question

The students in a class are surveyed to find out how many siblings they have. The data is displayed in a frequency table:

Calculate the mean number of siblings, to three significant figures.

Answer 1

• 1.52

Explanation:

The mean number of siblings:

• (0*5 + 1*10 + 2*8 + 3*2 + 4*1 + 5*1)/(5 + 10 + 8 + 2 + 1 + 1) =
• 41 /27 =
• 1.52 (rounded)