Although child mortality rates have dropped by more than 50% since 1990, in 2015 it was still the case that 16,000
children under five years old died each day. The mortality rates for children under five varied from 1.9
per 1000
in Luxembourg to 156.9
per 1000
in Angola. Although the data set includes 213
countries, the child mortality rates of 22
countries were not available on the World Health Organization database. The data set is too large to show, so the table contains the data for the first five countries.

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0