Use the given information to find the number of degrees of freedom, the critical values chi Subscript Upper L Superscript 2 and chi Subscript Upper R Superscript 2, and the confidence interval estimate of sigma. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 98% confidence; nequals21, sequals0.28 mg. LOADING... Click the icon to view the table of Chi-Square critical values. dfequals nothing (Type a whole number.)
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