is Question: 1 pt 80110 (3 complete) ? This Quiz: 10 pts possib se te given form

Question

is Question: 1 pt 80110 (3 complete) ? This Quiz: 10 pts possib se te given formation to find the number of degrees of freedom, the critical values X and X hat a simple random sample has been selected from a population with a normal distribution and the confidence interval estimate of ? t is reasonable to assume Nicotine in menthol cigarettes 95% confidence, n-25, s: 0.26 mg Click the icon to view the table of Chi-Square critical values (Type a whole number) ? (Round to three decimal places as needed.) ? (Round to three decimal places as needed ) The confidence interval estimate of ? is [] mgco mg (Round to two decimal places as needed.) Enter your answer in each of the answer boxes Statistics and Probability

Explanation / Answer

solution:-
df = n - 1 = 25 - 1 = 24
critical values
given confidence interval is 98% then alpha values is 0.01
X^2 L = 12.4
X^2 R = 39.36

given s = 0.26 then s^2 = 0.0676
confidence interval for standard deviation formula
=> sqrt((n-1)s^2/X^2 R) < ? < sqrt((n-1)X^2 L)
=> sqrt((24) 0.0676/ 39.36) < ? < sqrt((24)0.0676 /12.4)
=> 0.20 < ? < 0.36

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