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tatyana61
2 months ago
10

A teacher wants to see if a new unit on factoring is helping students learn. She has five randomly selected students take a pre-

test and a post test on the material. The scores are out of 20. Has there been improvement? (pre-post) What value of t would you use for the 95% confidence interval?

Mathematics
1 answer:
tester [12.3K]2 months ago
4 0
The t-value used for the 95% confidence interval for paired data is 2.776. Step-by-step explanation: The confidence interval for the mean difference in paired data is defined by a specified formula. Here, the sample mean difference, the standard deviation of that difference, and the sample size (n) are integral. The critical t-value corresponds to the degrees of freedom, specifically n - 1, and with n being 5 and a confidence level of 95%, the critical value obtained from a t-table is 2.776.
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