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The scores of students taking the ACT college entrance examination are normally distributed with a mean µ = 20.1 and a standard deviation σ = 5.8.
a) A single student is selected at random. Determine the probability that their ACT score was between 18 and 24.
b) Determine the probability that a simple random sample of 25 students would earn an average score of at least 22.
Types of distribution Population distribution This refers to the distribution of the individual values of population. This mean it is denoted by 'µ' Sample distributi
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