Question
In: Statistics and Probability
The following data represent the pH of rain for a random sample of 12 rain dates...
The following data represent the pH of rain for a random sample of 12 rain dates in a particular region. A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers. The sample standard deviation is sequals0.344. Construct and interpret a 99% confidence interval for the standard deviation pH of rainwater in this region
Solutions
Expert Solution
Solution :
Given that,
s = 0.344
s2 = 0.118336
2L
=
2
/2,df
= 26.757
2R
=
21 -
/2,df = 2.603
The 99% confidence interval for 
is,
(n
- 1)s2 /
2/2
<
<
(n - 1)s2 /
21 -
/2
11
* 0.118336 / 26.757 <
<
11 * 0.118336 / 2.603
0.2206 <
< 0.7071
(0.2206 , 0.7071 )
orchestra answered 2 years agoRelated Solutions
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The following data represent the pH of rain for a random sample of 12 rain dates....
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come from a population that is normally distributed. A boxplot
indicates there are no outliers. Complete parts (a) through (d)
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