Assume the random variable X is normally distributed with mean μ = 720 and standard deviation σ = 74. What is the probability that a random variable is between 646 and 702? Round your answer to four decimal places.
Added by Sara J.
Step 1
First, we need to standardize the values of 646 and 702 using the formula: z = (x - μ) / σ where x is the value we want to standardize, μ is the mean, and σ is the standard deviation. For 646: z = (646 - 720) / 74 = -1.00 For 702: z = (702 - 720) / 74 = Show more…
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