When comparing differences between the percentages of two groups and our z is 1.98 at the 95% level of confidence,we may conclude the two percentages are significantly different.

Question

Quizplus · Accepted Answer

At a 95% level of confidence, a z score of 1.98 falls beyond the critical value of 1.96 (which is the z value for 95% confidence level), indicating that the differences between the percentages of the two groups are statistically significant. Therefore, the answer is A, true.

When Comparing Differences Between the Percentages of Two Groups and Our