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    Confidence interval for mean

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    Hack Wilson¿s major league record of 190 runs batted in during a single season in professional baseball has stood for 70 years. Perhaps the reason for this longevity is that the average for all the other league leaders is so far below the total Wilson knocked in back in 1930. A confidence interval might provide a clue. A random sample of 40 other league-leading RBI season totals is shown below:

    109
    175
    145
    125 121
    163
    136
    129 103
    174
    132
    121 128
    145
    143
    139 115
    125
    142
    122 103
    128
    130
    133 141
    124
    119
    123 137
    138
    127
    121 131
    159
    109
    125 143
    129
    140
    129

    Construct a 99% confidence interval for the mean of all major league RBI leaders in a season.

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    Solution Summary

    This solution gives the step by step method for computing confidence interval for estimating population mean.

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