statistics

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What is meant by the 95% confidence interval of the mean ?
That 95% of my sample is OK to do more tests.
That I am 95% confident that the confidence interval will contain the parameter being estimated.
That 5% of my sample is not OK.
That I am 95% sure that the population mean is 95.

  • statistics -

    Check out the second choice.

  • statistics -

    The ages of students at a university are normally distributed with a mean of 21. What percentage of the student body is at least 21 years old?

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