The HumanDevelopment Report 2014, published by the UN, showed life expectancies by country. ForWestern Europe, the values reported were Denmark 79, Portugal 80, Netherlands 81, Finland 81, Greece 81, Ireland 81, United Kingdom 81, Belgium 81, France 82, Germany 81, Norway 82, Italy 82, Spain 82, Sweden 82, Switzerland 83.

For Africa, the values reported were Botswana 64, Zambia 58, Zimbabwe 60, Malawi 55, Angola 52, Nigeria 52, Rwanda 64, Uganda 59, Kenya 62, Mali 55, South Africa 57, Congo 59, Madagascar 65, Senegal 64, Sudan 62, Ghana 61.

(a) Which group of life expectancies do you think has the larger standard deviation?Why?

(b) The standard deviation is 0.96 for the Western European nations. Find the standard deviation for the African nations. Compare them to illustrate that s is larger for the group that shows more spread.