For a school play, the teacher asked the class to set up chairs in 20 rows with 25 chairs in each row. After setting up all the
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Answer:
The 95% confidence interval for the standard deviation is (0.14, 0.54).
Step-by-step explanation:
The complete data and question is:
Sloth CW Ratios ; {1.5 , 1.09 , 0.98 , 1.42 , 1.49 , 1.25}
The 95% confidence interval for the standard deviation of this data is < σ < (two decimals - include the leading zero) .
Solution:
Compute the sample standard deviation as follows:
The (1 - <em>α</em>)% confidence interval for the variance is:
Confidence level = 95%
⇒ α = 0.05
The degrees of freedom is,
df = n - 1 = 6 - 1 = 5
Compute the critical values of Chi-square:
*Use a Chi-square table.
Compute the 95% confidence interval for the variance as follows:
Thus, the 95% confidence interval for the standard deviation is (0.14, 0.54).
