The formula for the standard error of the sample slope b is se = s/(x - )2,
Question:
a. Show that the smaller the value of s, the more precisely b estimates β.
b. Explain why a small s occurs when the data points show little variability about the prediction equation.
c. Explain why the standard error of b decreases as the sample size increases and when the x values display more variability.
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Related Book For
Statistics The Art And Science Of Learning From Data
ISBN: 9780321755940
3rd Edition
Authors: Alan Agresti, Christine A. Franklin
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