vi. The table shows the CPI for 3 consecutive years. What is the rate of inflation in 2020? Calculate your answer to one
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vi. The table shows the CPI for 3 consecutive years. What is the rate of inflation in 2020? Calculate your answer to one decimal place. (2 marks) Year CPI 2018 104.0 2019 109.1 2020 118.3 Page 2 of 12
B6AF104 vii. The histogram below shows the ages of employees in a company. By what percentage are there less people in the 60-70 age group than in the 50-60 age group? (2 marks) 6- 5 5 3 Frequency 3 2 2- 1- 0 20 30 70 40 50 60 Histogram (Frequency Diagram) viii. Use the standard normal probability table to calculate the probability P(z<-0.21). (3 marks) ix. The data below shows the price of a litre of milk (in cents) at a random sample of 10 supermarkets in Dublin. Calculate the mean and standard deviation of the prices. (3 marks) 108 125 130 180 139 125 130 175 199 139 X. Calculate the expected value of the following random variable X. (2 marks) X 0 1 5 10 P(X) 0.3 0.2 0.1 0.4