The frequency distribution of the length of a sample of 98 nails is presented in Table 2.11 (measured to the nearest 0.1 mm). (a) Find the mean length of this sample by hand and by using a spread...

The frequency distribution of the length of a sample of 98 nails is presented in Table 2.11 (measured to the nearest 0.1 mm).

(a) Find the mean length of this sample by hand and by using a spread sheet.

(b) Construct the cumulative frequency graph and use this to estimate the median.

(c) Check the value of the median using the formula method.