Concept explainers
(a)
Find the point estimate for the average annual rainfall amount at ant sites in the Dry Steppe region of Central A.
(b)
Find the t-value for the 90% confidence interval.
(c)
Construct the 90% confidence interval for the true average annual rainfall amount at ant sites in the Dry Steppe region.
(d)
Interpret the interval in Part(c).
(e)
Check the validity of the confidence interval found in Part (c) using the data.
(f)
Find the point estimate for the average annual rainfall amount at ant sites in the Gobi Desert region of Central A.
Find the t-value for the 90% confidence interval.
Construct and interpret the 90% confidence interval for the true average annual rainfall amount at ant sites in the Gobi Desert region.
Check the validity of the confidence interval found in part (c) using the data.
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