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What is the Z-score

The following table presents a data file that lists the peak discharge from a hydroelectric project in Wisconsin for the years 1957 to 1968. The variable peak discharge has an interval level of measurement.

Year Peak Discharge
1957 1,120
1958 2,380
1959 886
1960 1,420
1961 1,480
1962 1,200
1963 657
1964 1,280
1965 1,640
1966 1,280
1967 1,740
1968 1,380

What is the Z-score for the year 1960?

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The solution file is attached.

Update:

n = 12 (Number of data)

x = 1420 (This is ...

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A Complete, Neat and Step-by-step Solution is provided in the attached file.

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