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In a study in which the subjects were 15 patients suffering from pulmonary sarcoid disease, a...

  1. In a study in which the subjects were 15 patients suffering from pulmonary sarcoid disease, a diagnostic test of blood gas determinations were made. The sample variance of the 15 test measures was 450. The dispersion of results was surprising, because it is believed that the population variance of blood gas determinations is only 250. Do our sample results allow us to reject the null hypothesis that s2 ≤ 250, with a significance level of a = 5%?

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