Part 3 Estimation
... cases out of 100 should differ by no more than 5 percentage points in either direction from what would have been obtained by interviewing all voters in the United States.ʺ Find the sample size suggested by this statement. B) 544 C) 27 D) 664 A) 385 75) In a certain population, body weights are norm ...
... cases out of 100 should differ by no more than 5 percentage points in either direction from what would have been obtained by interviewing all voters in the United States.ʺ Find the sample size suggested by this statement. B) 544 C) 27 D) 664 A) 385 75) In a certain population, body weights are norm ...
JOHN S. LOUCKS Chapter 9, Part A Hypothesis Tests Developing
... One-Tailed Test About a Population Mean: σ Unknown Critical Value Approach 4. Determine the critical value and rejection rule. For α = .05 and d.f. = 64 – 1 = 63, t.05 = 1.669 Reject H0 if t > 1.669 5. Determine whether to reject H0. Because 2.286 > 1.669, we reject H0. We are at least 95% confide ...
... One-Tailed Test About a Population Mean: σ Unknown Critical Value Approach 4. Determine the critical value and rejection rule. For α = .05 and d.f. = 64 – 1 = 63, t.05 = 1.669 Reject H0 if t > 1.669 5. Determine whether to reject H0. Because 2.286 > 1.669, we reject H0. We are at least 95% confide ...
Chapter 5: z
... In addition to knowing the basic definition of a zscore and the formula for a z-score, it is useful to be able to visualize z-scores as locations in a distribution. Remember, z = 0 is in the center (at the mean), and the extreme tails correspond to z-scores of approximately –2.00 on the left and +2. ...
... In addition to knowing the basic definition of a zscore and the formula for a z-score, it is useful to be able to visualize z-scores as locations in a distribution. Remember, z = 0 is in the center (at the mean), and the extreme tails correspond to z-scores of approximately –2.00 on the left and +2. ...