A population of values has a normal distribution with $mu = 240$ and $sigma = 71.8$. You intend to draw a random sample of size $n = 42$. Find the probability that a single randomly selected value is less than 217.8. $P(X < 217.8) =$ Find the probability that a sample of size $n = 42$ is randomly selected with a mean less than 217.8. $P(M < 217.8) =$ Enter your answers as numbers accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
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8 using the formula z = (x - μ) / σ. z = (217.8 - 240) / 71.8 z = -22.2 / 71.8 z = -0.3092 Show more…
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