Question
In: Statistics and Probability
A random sample of 18 novels has a standard deviation of 20 pages. A 95% confidence...
A random sample of 18 novels has a standard deviation of 20 pages. A 95% confidence interval for the standard deviation in the length of all novels is from _______ to _______ (round to the nearest tenth of a page, so one decimal place)
Solutions
Expert Solution
A random sample of 18 novels has a standard deviation of 20 pages. A 95% confidence interval for the standard deviation in the length of all novels is from 15.0 to 30.0 (round to the nearest tenth of a page, so one decimal place)
Explanation:
n = 18
s = 20
= 0.05
df = 18 - 1 = 17
Confidence Interval:
Low End:
From Table:
= 30.191
Low End:
High End:
From Table:
= 7.5642
High End:
Confidence Interval:
15.0 < 
< 30.0
orchestra answered 2 years agoRelated Solutions
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