Explain why the t-distribution has less spread as the number of degrees of freedom increases.
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Engineering, 12.12.2019 23:31 gege158
Explain why the t-distribution has less spread as the number of degrees of freedom increases.
(a) the t-distribution has less spread as the degrees of freedom increase because, for large values of n, ngreater than or equals30, the t-distribution and the normal distribution are the same.
(b) the t-distribution has less spread as the degrees of freedom increase because, as n increases, less information is known about sigma by the law of large numbers.
(c) the t-distribution has less spread as the degrees of freedom increase because the variability introduced into the t-statistic becomes greater as n increases.
(d) the t-distribution has less spread as the degrees of freedom increase because, as n increases, s becomes closer to sigma by the law of large numbers.
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