CONFIDENCE INTERVALS FOR THE DIFFERENCE IN 2 POPULATION MEANS Children in two elementary school classrooms were given two versions of the same test, but with the order of questions arranged from easier to more difficult in Version A and in reverse order in Version B. Randomly selected students from each class were given Version A (sample 1) and the rest Version B (sample 2). The 95% confidence interval for the difference in the average score between students taking Version A and students taking Version B is (-10, -2). Interpret this interval. O u1 is similar to µ2, therefore we can be 95% confident that the average score for students taking Version A is similar to that of students taking Version B. µ1 is substantially more than µ2, therefore we can be 95% confident that the average score for students taking Version A s substantially less than for students taking Version B. µ1 is substantially less than µ2, therefore we can be 95% confident that the average score for students taking Version A s substantially less than for students taking Version B.

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CONFIDENCE INTERVALS FOR THE DIFFERENCE IN
2 POPULATION MEANS
Children in two elementary school classrooms were given
two versions of the same test, but with the order of
questions arranged from easier to more difficult in
Version A and in reverse order in Version B. Randomly
selected students from each class were given Version A
(sample 1) and the rest Version B (sample 2). The 95%
confidence interval for the difference in the average score
between students taking Version A and students taking
Version B is (-10, -2). Interpret this interval.
O u1 is similar to µ2, therefore we can be 95% confident that the
average score for students taking Version A is similar to that of
students taking Version B.
µ1 is substantially more than p2, therefore we can be 95%
confident that the average score for students taking Version A is
substantially less than for students taking Version B.
µ1 is substantially less than µ2, therefore we can be 95%
confident that the average score for students taking Version A is
substantially less than for students taking Version B.
Transcribed Image Text:CONFIDENCE INTERVALS FOR THE DIFFERENCE IN 2 POPULATION MEANS Children in two elementary school classrooms were given two versions of the same test, but with the order of questions arranged from easier to more difficult in Version A and in reverse order in Version B. Randomly selected students from each class were given Version A (sample 1) and the rest Version B (sample 2). The 95% confidence interval for the difference in the average score between students taking Version A and students taking Version B is (-10, -2). Interpret this interval. O u1 is similar to µ2, therefore we can be 95% confident that the average score for students taking Version A is similar to that of students taking Version B. µ1 is substantially more than p2, therefore we can be 95% confident that the average score for students taking Version A is substantially less than for students taking Version B. µ1 is substantially less than µ2, therefore we can be 95% confident that the average score for students taking Version A is substantially less than for students taking Version B.
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