A normal distribution has a mean of 137 and a standard deviation of 7. Find the z-score for a data value of 121.
Solution:
The z-score for a data value X is given as follows:
Where, μ is mean and σ is standard deviation.
We have, μ = 137 and σ = 7
Hence, the z-score for a data value of 121 is,
The z-score for a data value of 121 is -2.2857.
Note: The z-score is rounded to 4 decimal places.
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A normal distribution has a mean of 137 and a standard deviation of 7. Find the...
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