A study was conducted to evaluate the stress level of senior business students at a particular college. Forty students were selected at random from the senior business class, and their stress level...

Extracted text: A study was conducted to evaluate the stress level of senior business students at a particular college. Forty students were selected at random from the senior business class, and their stress level was monitored by attaching an electrode to the frontalis muscle (forehead For the 40 students, the mean EMG (electromyogram) activity was found to be 35.8 microvolts and the standard deviation of the EMG readings was found to be 2.5 microvolt. Find a 90% confidence of the population mean for the EMG of the business students. Using the formula for Confidence Intervals, round each value to 2 decimal places. Remember not using the formula may give you the wrong answer. Rounding counts. The 90% confidence interval is 35.15 to 36.45