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After collecting a random sample of 101 individuals living in Arizona, you determine that the 95% confidence interval for the mean income is (61,128; 74,449).
After collecting a random sample of 101 individuals living in Arizona, you determine that the 95% confidence interval for the mean income is (61,128; 74,449). What was the standard deviation of income for the sample?
Hint: you'll need to find the critical value for t using a t-table(Links to an external site.).
Round your answer to four decimal places.
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