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    Statistical Analysis in a Random Sample

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    You select a random sample of n=14 families in your neighborhood and find the following family size (number of people in the family).
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    10
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    a) What is the mean family size for the sample? I think the answer here is all the above #'s * 14=7.37143
    The mean family size for the sample is _7.36

    b) What is the standard deviation for the sample?_______( round to the nearest tenth)

    c) What is the best estimate for the mean family size for the population of all families in a country?________

    d) What is the 95% confidence interval for the estimate? _____< µ < ____

    e) Comment on the reliability of the estimate. Choose below
    (a) The sample is likely to be representative of all families in a country
    (b) The sample is unlikely to be very representative of all families in a country
    (c) There is not enough data to make a conclusion

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    Solution Preview

    Hi there,

    Thanks for letting me work on your post. Here is my explanation:

    a. Mean=(6+7+10+9+8+6+7+7+6+7+6+7+8+9)/14=7.36. so you are right for this question.

    b. Standard ...

    Solution Summary

    The statistical analysis in a random sample are examined.

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