Question: IQ test score is assumed normally distributed with known standard deviation of 10 units. The sample mean score from 75 people was 105.2 units. Find

IQ test score is assumed normally distributed with known standard deviation of 10 units. The sample mean score from 75 people was 105.2 units. Find a 90% confidence interval for the population mean . What is the UPPER BOUND? ______________________________ Note: Enter XXX.X AT LEAST ONE DIGIT BEFORE THE DECIMAL, ONE AFTER and round up. Thus, 347 is entered as 347.0, 3.52 is entered as 3.5, 0.2750 is entered as 0.3, -0.564 is entered as -0.6

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