Question

On January 1, 2018, 410 out of a sample of 957 voters approved of Justin Trudeau's performance as Prime Minister. On January 1, 2019, 363 out of a sample of 930 voters approved of Justin Trudeau's performance as Prime Minister. What is the lower confidence limit (LCL) of the 95% confidence interval estimate of the DIFFERENCE between the percent of voters who approved of Trudeau's performance in 2019 and those who approved of it in 2018? Give your answer as a PERCENT, rounded to two decimal points.

Answer 1