he first sample has n =4 scores and a variance of s2 = 55, and the second sample has n = 6 scores and a variance of s2 = 63. Now the sample variances are increased so that the first sample has n ‑ 4 scores and a variance of s2 = 220, and the second sample has n = 6 scores and a variance of s2 = 252. Comparing your answers for parts a and b, how does increased variance influence the size of the estimated standard error

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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For each of the following, calculate the pooled variance and the estimated standard error for the sample mean difference.

 

  1. The first sample has n =4 scores and a variance of s2 = 55, and the second sample has n = 6 scores and a variance of s2 = 63.
  2. Now the sample variances are increased so that the first sample has n ‑ 4 scores and a variance of s2 = 220, and the second sample has n = 6 scores and a variance of s2 = 252.
  3. Comparing your answers for parts a and b, how does increased variance influence the size of the estimated standard error
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