Which of the following statements is false? 1) We use one-sample procedures when our samples are equal in size but arent independent 2) Everything else being equal, a confidence interval based on 15 degrees of freedom will be narrower than one based on 10 degrees of freedom. 3) We can pool our estimates of the population variance ifwe want a narrower confidence interval for a given confidence level. A. None of the above gives the correct response B. 2 only C. 1 only D. 3 only E. 1 and 2 only

Question

Which of the following statements is false?  1) We use one-sample procedures when our samples are equal in size but arent independent  2) Everything else being equal, a confidence interval based on 15 degrees of freedom will be narrower than one based on 10 degrees of freedom.  3) We can pool our estimates of the population variance ifwe want a narrower confidence interval for a given confidence level.  A. None of the above gives the correct response  B. 2 only  C. 1 only  D. 3 only  E. 1 and 2 only

Kirsten Davis · Accepted Answer

First question: (1) is wrong because we use paired-t test   (2) is right because when df increases, t distribution becomes light tailed, and approaches to z   (3) No, for 2-sample procedures, on paired-t test requires same size.   E. 1 and 2 only are false

Janet Young · Accepted Answer

Option E. 1 and 2 only

Which of the following statements is false? 1) We use on

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