The average salary of 81 random employees in a certain financial sector was 3400 USD. The sample standard deviation was 270 USD. We are interested in the 60% confidence interval for the population mean. What is the value of the ta/2 used? Select one: O a. 2.639 O b. 1.292 O c. 1.664 O d. 2.374 O e. 0.846 O f. 1.990

MATLAB: An Introduction with Applications
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The average salary of 81 random employees in a
certain financial sector was 3400 USD. The sample
standard deviation was 270 USD. We are
interested in the 60% confidence interval for the
population mean. What is the value of the ta/2
used?
Select one:
O a. 2.639
оБ. 1.292
О с. 1.664
O d. 2.374
O e. 0.846
O f. 1.990
Transcribed Image Text:The average salary of 81 random employees in a certain financial sector was 3400 USD. The sample standard deviation was 270 USD. We are interested in the 60% confidence interval for the population mean. What is the value of the ta/2 used? Select one: O a. 2.639 оБ. 1.292 О с. 1.664 O d. 2.374 O e. 0.846 O f. 1.990
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