Question

With reference to Exercise 11.24, use the large-sample confidence- interval formula of Exercise 11.19 to construct a 99% confidence interval for the standard deviation of the annual growth of the given kind of cactus.
In exercise
A study of the annual growth of certain cacti showed that 64 of them, selected at random in a desert region, grew on the average 52.80 mm with a standard deviation of 4.5 mm. Construct a 99% confidence interval for the true average annual growth of the given kind of cactus.


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  • CreatedNovember 04, 2015
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