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Do bonds reduce the overall risk of an investment portfolio? Let x be a random variable representing annual percent return for the Vanguard Total Stock Index (all Stocks). Let y be a random variable representing annual return for the Vanguard Balanced Index (60% stock and 40% bond). For the past several years, assume the following data. Compute .
x: 14 0 36 23 33 25 26 14 14 23
y: 6 5 26 17 24 17 17 5 6 6


4607

4803

5332

4243

4940

  • statistics -

    4343

  • statistics -

    x:
    15
    0
    38
    25
    31
    27
    28
    15
    15
    25
    y:
    8
    2
    29
    18
    26
    16
    18
    2
    3
    8

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