For the standardized dataset , the value of median = mean , which is equal to 7
The mean of the close friends people have = 7
The variance = 100
Standard deviation can be found using the formula
          v = σ²
where  v is the variance and
      σ is the standard deviation
Then ,          σ² = 100
              σ  = √100
              σ  = 10
Therefore , the standard deviation for the close friends have is 10
The standard score for these vales can be found using the formula
             Z = (X - μ) / σ
where Z is the standard score
      X is the raw score
      μ is the mean
      σ is the standard deviation
Using this formula, the standard score of any raw score can be calculated.
For, the standardized dataset , the value of median will be equal to value of median.
              Median = mean
              Median = 7
Learn more about the normal distribution in
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