Question

(1 point) Recent polls indicate that if a federal election would be held today, 33.3% of Canadian voters would cast his/her vote for the Liberal Party candidate in his/her riding. Suppose you are a political pollster, and you are to randomly pick n = 319 Canadian voters, asking each Which political party will you support in the next federal election? (a) What can you expect the value of p to be? II Enter your answer using all the decimals you can (b) Find the value of the standard deviation of p. Enter your answer using all the decimals you can (c) Find the probability that proportion of your sample of 349 that will indicate support for the Liberal Party is at least 31% to at most 36%. Enter your answer using all the decimals you can P(0.31 SP < 0.36) - (d) 4% of the time, the observed value of your statistic p will exceed what value? Enter your answer using all the decimals you can

Answer 1

solution - ay E (B) = $ = 10:333 b) VODY 0-939) (1-0-333) 3 49 9 P/0.316 h 20.36) 0.31 0.333 0.025227 0.36-0.333 <7 < < 0.025227 o or =pl-o.glcze 1.07) = 10.6763] d) z-score for top 4% of score = 1.75 ) Z = þ- lb wasſ - 0.333 0.025227 = 0.397147