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9.1 A single population mean using the normal distribution  (Page 11/20)

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  • Card 11 / 20:
    Announcements for 84 upcoming engineering conferences were randomly picked from a stack of IEEE Spectrum magazines. The mean length of the conferences was 3.94 days, with a standard deviation of 1.28 days. Assume the underlying population is normal.

    In words, define the random variables X and X ¯ .Which distribution should you use for this problem? Explain your choice.Construct a 95% confidence interval for the population mean length of engineering conferences. State the confidence interval. Sketch the graph. Calculate the error bound.

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Practice FlashCards 9 Key Terms 2

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Source:  OpenStax, Introduction to statistics i - stat 213 - university of calgary - ver2015revb. OpenStax CNX. Oct 21, 2015 Download for free at http://legacy.cnx.org/content/col11874/1.3
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