biostat ques - ira3

[ArchivalUser]

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?

4
2
1
.05
.1

[ArchivalUser]

95 % means SD is 2

[ArchivalUser]

Z-score x standard error of the mean

for 95% :

2 x 20 / sq root of 100 = 4

[ArchivalUser]

what population size you take? can you plz explain monter