DesStats Exercises

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Exercises

  1. You have the following dataset:

    Data [math]1[/math] [math]2[/math] [math]3[/math] [math]4[/math] [math]5[/math] [math]6[/math] [math]7[/math] [math]8[/math] [math]9[/math] [math]10[/math]
    [math]x_i[/math] [math]52[/math] [math]48[/math] [math]36[/math] [math]62[/math] [math]51[/math] [math]51[/math] [math]58[/math] [math]64[/math] [math]39[/math] [math]45[/math]

    1. Calculate the sample mean and the sample standard deviation of [math]x_i[/math]. 50,8.6410

    2. Calculate the population standard deviation and variance of [math]x_i[/math]. 8.1976,67.2

    3. What is the Median of [math]x_i[/math]. 50

  2. You realise that you forgot to take account of an 11th observation that should be added to the above dataset. Your assistance adds the 11th observation and reports a new sample average of 49. What is the value of the observation that has been added? 39

Footnotes

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