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3 November, 07:50

Find the critical value tc for the confidence level cequals 0.95 and sample size nequals 19.

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  1. 3 November, 10:45
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    The critical values are fixed values which can be obtained from the standard t crit tables. We can find the critical value tc when the degrees of freedom and confidence level are given. The degrees of freedom is simply:

    Degrees of Freedom = Number of samples - 1

    Degrees of Freedom = 19 - 1

    Degrees of Freedom = 18

    From the t critical tables, the tc corresponding to Degrees of Freedom equal to 18 and Confidence level equal to 95% is as follows:

    tc = 2.101

    Therefore this means that any t value beyond 2.101, we already reject the null hypothesis.
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