Math 240

ctivities CHALLENGE ACTIVITY 7.2.1: Confidence intervals for population proportions. Critical values for quick reference during this activity. Confidence level Critical value 0.90 2 = 1.645 0.95 z*- 1.960 0.99 z = 2.576 V Jump to level 1 V A poll reported 32% support for a statewide election with a margin of error of 2 4.3 percentage points. How many voters should be sampled for a 90%% confidence interval? Round up to the nearest whole number. Ex: 1234# voters