Previous surveys reported that more men than women trade stocks online. A local brokerage firm randomly selected a sample of investors. They found that 45 out of 234
Men traded online and 42 out of 251 women traded online. The 95% confidence interval
For the difference in proportions is
A) 4% to 9%
B) -4% to 9%
C) 2% to 12%
D) -2% to 12%
E) -2% to -4%

Question

Quizplus · Accepted Answer

The confidence interval includes 0, indicating that the difference in proportions could be negative, zero, or positive. This suggests there's uncertainty about whether more men than women trade stocks online, or vice versa, or if their trading behaviors are similar. The interval from -4% to 9% encompasses this range of possibilities, including no difference (0%).

Previous Surveys Reported That More Men Than Women Trade Stocks