Example 2: A sample of 20 students were given a test before attending a particular seminar and then again after attendin

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Example 2 A Sample Of 20 Students Were Given A Test Before Attending A Particular Seminar And Then Again After Attendin 1 (110.96 KiB) Viewed 22 times

Example 2: A sample of 20 students were given a test before attending a particular seminar and then again after attending the seminar. Does the seminar lead to improvement in students' knowledge (measured through test scores)? Find and interpret the 95% confidence interval and use it to answer the question. What assumptions have to be met? State and check them. Pre-seminar 17 18 21 16 22 19 24 17 21 23 18 14 16 16 19 18 29 12 22 15 score Post-seminar 16 22 25 17 24 16 29 20 23 19 20 15 15 18 26 18 24 18 25 19 18 26 18 24 score Difference (pre post) 1 -4 -4 1-1 1-2 3 -5 -3 -2 4 -2 -1 1 -2 -7 0 5 1-6 1-3 1-4 d = -1.6, Sd = 3.202