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Given below is the formula for computing the confidence

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WestCo is a well established company with thousands of employees and they want to estimate the average age of their workers. A sample of 38 employees was taken.

Given that the population standard deviation is 12.70 and the sample mean is 41.32, what is the range of values for a 90% confidence interval.

Given below is the formula for computing the confidence interval. Fill in the missing values. For full marks your answer should be accurate to at least two decimal places.

|(x± o)|

IQ time grade
105 10 75
110 12 79
120 6 68
116 13 85
122 16 91
130 8 79
114 20 98
102 15 76

Reference no: EM13574508

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