63 63 73 71 65 69 93 b What is the range for 95 of the data to c What is the range for 99 of the data to 17 The ages of members in a snowboarding club are normally distributed with a mean of 25 and a standard deviati 4 years 2 marks 18 a What percent of the members are younger than 20 b If there were 80 members in the snowboarding club how many would be under 20 years old The ages of members in a snowboarding club are normally distributed with a mean of 25 years and a sta deviation of 4 years 2 marks a What percent of the members are between 20 and 28 b If there were 80 members in the snowboarding club how many would be between 20 and 28