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Ten patients have their bone density measured using ultrasound. The standardised bone density scores of each patient were as follows: 1.270.32 -0.690.290.92 -0.090.61 -0.09 -1.15

Ten patients have their bone density measured using ultrasound. The standardised bone density scores of each patient were as follows:

1.270.32 -0.690.290.92 -0.090.61 -0.09 -1.15 -0.29

The variance of the standardised bone density scores for the 10 patients is: (answer to three decimal places

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