Complete the statement. Round your answer to the nearest thousandth.In a population that is normally distributed with mean 28 and standard deviation 20, the bottom 10% of the values are those less than ___.
Q. Complete the statement. Round your answer to the nearest thousandth.In a population that is normally distributed with mean 28 and standard deviation 20, the bottom 10% of the values are those less than ___.
Find Z-Score: We need to find the z-score that corresponds to the bottom 10% of a normal distribution.
Use Z-Table: Using a z-table, we find that the z-score for the bottom 10% is approximately −1.282.
Z-Score Formula: Now we use the z-score formula: z=standard deviationX−mean. We need to solve for X, which represents the value we're looking for.
Rearrange Formula: Rearrange the formula to solve for X: X=z×standard deviation+mean.
Plug in Values: Plug in the values: X=−1.282×20+28.
Calculate Value: Calculate the value: X=−25.64+28.
Round to Nearest Thousandth:X=2.36, but we need to round to the nearest thousandth.
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