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Confidence Intervals: Difference of Two Proportions Practice Test
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Q1
A tech company compares the proportion of users who enable two-factor authentication (2FA) on two app versions. In independent random samples, 410 of 800 users on Version 1 enabled 2FA and 372 of 820 users on Version 2 enabled 2FA. A 95% confidence interval for $p_1 - p_2$ is $(0.01,\ 0.11)$. Which interpretation is correct?
A tech company compares the proportion of users who enable two-factor authentication (2FA) on two app versions. In independent random samples, 410 of 800 users on Version 1 enabled 2FA and 372 of 820 users on Version 2 enabled 2FA. A 95% confidence interval for $p_1 - p_2$ is $(0.01,\ 0.11)$. Which interpretation is correct?