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    Statistics Concepts: Cases and Observations

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    14. Approximately ______ of the area (cases or observations) under the
    normal curve is found between 1 standard deviation above and 1 standard deviation below the mean.

    15. What percentage of area (or cases or observations) is found above a z value of 1.96? ._____

    16. A random sample of 20 observations is drawn from a population with a standard deviation of 677. Calculate the standard error of the mean.

    17. Under what condition do you calculate the t statistic?

    18. Under what condition do you calculate the z statistic?

    19. Define Type I error. (2 Points) Define Type II error:

    23. A _____________ table is a classification tool that reveals the various possibilities in the comparison of two variables.

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    14. Approximately ______ of the area (cases or observations) under the
    normal curve is found between 1 standard deviation above and 1 standard deviation below the mean. (2 Points)

    The answer is P(|Z|>1)=0.3173

    You can use z-table to find P(Z<-1)=P(Z>1)=0.1587.

    15. What percentage of area (or cases or observations) is found above a z value of 1.96? ._____ (2 Points)

    The ...

    Solution Summary

    This solution considers statistics concepts.

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