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Dr. Jones conducted a study and found that the 95% confidence interval for the data in his sample was 42-64. Based on this information, we

Dr. Jones conducted a study and found that the 95% confidence interval for the data in his sample was 42-64. Based on this information, we know that the margin of error is ______.

a) 11

b) 20

c) 22

d) 47

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