How do I find chi-squared or t-values on their respective tables of value for large degrees of freedom?

So ... I already know how to find t-values and chi-squared values on the tables .

Problems is ... pretty much all tables go only until 50 or 100 degrees of freedom. I just found a problem where I need to know the chi-squared value for a probability with 212 degrees of freedom and I'm stuck.

2 Answers

  • 8 years ago
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    By the central limit theorem, it converges to a normal distribution for large degrees of freedom (k). For k > 50 the distribution is sufficiently close to a normal distribution for the difference to be ignored. Specifically, if k tends to infinity, the distribution of tends to a standard normal distribution with ...

    mean = k

    std dev = √(2k)

    That means you can find the z-value and the corresponding probability ...

    z = (x - k) / √(2k)

    hope that helps

  • 4 years ago

    The correlation coefficient between 2 random variables: a. Is a variety between -1 and 1 d. Is estimated in Excel through utilising function CORREL the median is: d. The valued at that diveide the advantage sequence into 2 equal elements

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