) 3. A sample of 100 apples is taken from a load. The diameters of the apples have the following distribution Diameter (cm) 6 7 8 9 10 frequency 21 38 17 13 .1. Determine the mean and standard deviation of the diameters. (3 marks) Assuming the distribution is approximately normal with this mean and standard deviation, find the range of the size of apples for picking if 5% are rejected as too large and 5% are rejected as being too small.