Assume that X follows a normal distribution with a standard deviation of 20. Given that P(X <= 30) = 0.2105 determine the mean of X?
Added by Katherine F.
Step 1
Therefore, we can find the z-score corresponding to P(X <= 30) as follows: z = (30 - μ) / σ where μ is the mean of X and σ is the standard deviation of X. Using the standard normal distribution table or a calculator, we can find that the z-score corresponding Show more…
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