Questions on a statistics exam are considered good questions provided the questi
ID: 3254412 • Letter: Q
Question
Questions on a statistics exam are considered good questions provided the questions discriminate between students who have studied for the exam and those who have not studied. Suppose that on a particular statistics exam the students were separated into two groups, the group that studied and the other group that had not studied. Data was collected and a 95% confidence interval for the difference in the proportion of those passing the exam from the group that studied and the proportion of those passing the exam from the group that had not studied. The confidence interval turned out to be (-0.005, 0.125). Note that sample 1 is from the group that studied and sample 2 is from the group that did not study. Select the best answer. Select one: A. We are 95% confidence that there is no statistically significant difference between passing rates of those who studied and those who did not study. B. We are 95% confident that those who studied had higher passing rate than those who did not study. C. We are 95% confident that those who studied had a lower passing rate than those who did not study. D. None of the these are correct. A random sample of size 100 was taken from a population. A 94% confidence interval to estimate the mean of the population was computed based on the sample data. The confidence interval for the mean is: (107.62, 129.75).| What is the z-value that was used in the computation. Round your z-value to 2 decimal places.Explanation / Answer
middle question:
as above interval contains 0 as probable value.
we are 95% confident that there is no statistically significant .... option A
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