Question of the Week # 473

  1. You are reading a study that was conducted to evaluate IQ (intelligence quotient) scores for patients with bipolar disease. Ten patients did not complete the test. Two patients refused to begin the test. Results for the 94 patients who completed the test revealed an average IQ of 130 with a standard deviation of 20. Which of the following best represents the 95% confidence interval for this study?
  1. 4
  2. 2
  3. 1
  4. .05
  5. .1

5 Responses

  1. A

  2. dr archer please leave explanation on how to calculate C.I, thank you

  3. for 95 ci we have z value of 1.96 sample size is 94 and sd is 2 so
    formula is Zx sd/underroot of sample size
    underroot of 94 is 9.6

    answer is 4

  4. A

  5. 1. 4

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