Question: Forty-five voters were randomly selected and asked to rate how likely they were to vote for a candidate who pronounced the name of their state "Missouruh." Forty-five other voters were randomly selected and asked to rate how likely they were to vote for a candidate who said "Missouree." Is there a significant difference in the ratings of the two types of candidates using alpha level of .05 and a two-tailed test? How large is the effect?

sample statistics:

"Missouruh" mean = 70 std. dev. = 20 N = 45

"Missouree" mean = 62 std. dev. = 20 N = 45