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From our last lesson about z-score, we know that z-score corresponds to different proportions in a...

From our last lesson about z-score, we know that z-score corresponds to different proportions in a normal distribution. It might be handy to remember that: 1) 68.26% of all observed data values will fall within ONE standard deviation from the mean (that is to the left and to the right). 2) 95.44% of all observed data values will fall within TWO standard deviations from the the mean (again, that is to the left and to the right). 3) 99.74% of all observed data values will within THREE standard deviations from the mean (again, that is to the left and to the right). Question 1 Not yet answered Points out of 1.00 Flag question Question text The mean of human IQ is 100, and the standard deviation is 10. What is the proportion of the human population with IQ scores between 90 to 110? Keep your answer to four decimal places.

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We have Consider l O 0.6826 Hene, 68,267 of the human po pulahion wih scOe beleen 90 to 100 68.267. o all obseyed dato values

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