earn@|llinois ECON 203 All SP22: Economic Statistics ll (Arvin-Rad, H) Question 10 Not yet answered Poinls out of 1.00 '7 Flag question Previous page Suppose you are part of an NGO which is investigating the impact of hygiene and sanitary conditions on the spread of gastroenteritis in rural Africa. It is postulated that washing hands prior to cooking and intake of food, by more than half the population, reduces the spread of this disease. What sample size would be needed to form a 90% condence interval with a width of only .02 with no a prior information on the proportion of people who wash their hands? Zo_10 = 1.282 2035 = 1.645 20025 = 1.960 20.01 = 2.326 20005 = Selectone: O a. 34 O b. 1027 O c. 1028 0 d. 1691 0 e. 1692 Finish attempt r A WIIWIIIWE Finish attempt