Methods2025 NHT Exam 2 Section A · Q5CAS active1 mark
Normal probability between two scores
The scores of a national standardised test are approximately normally distributed with mean of 120 and standard deviation of 15. Andrew scored 117.9 and Chloe’s score is 1.2 standard deviations above the mean. The probability that a randomly selected participant achieved a score between Andrew and Chloe is closest to
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