Step 1 :Find the lower limit L1 and upper limit L2 of significant values: L1 = \( \mu - 2\sigma \) and L2 = \( \mu + 2\sigma \)
Step 2 :Calculate L1 and L2: L1 = \( 1069.3 - 2(123.7) \) and L2 = \( 1069.3 + 2(123.7) \)
Step 3 :Determine whether 1356.7 is significantly high by comparing it to L2.