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The Practice of Statistics | 5th Edition | ISBN: 9781464108730 | Authors: Daren S. Starnes, Josh Tabor
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Willows in Yellowstone Writers in some fields summarize data by giving x and its

Chapter 8, Problem 63

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QUESTION:

Willows in Yellowstone Writers in some fields summarize data by giving x and its standard error rather than x and sx. Biologists studying willow plants in Yellowstone National Park reported their results in a table with columns labeled x SE. The table entry for the heights of willow plants (in centimeters) in one region of the park was 61.55 19.03.21 The researchers measured a total of 23 plants. (a) Find the sample standard deviation sx for these measurements. Show your work. (b) A hasty reader believes that the interval given in the table is a 95% confidence interval for the mean height of willow plants in this region of the park. Find the actual confidence level for the given interval.

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QUESTION:

Willows in Yellowstone Writers in some fields summarize data by giving x and its standard error rather than x and sx. Biologists studying willow plants in Yellowstone National Park reported their results in a table with columns labeled x SE. The table entry for the heights of willow plants (in centimeters) in one region of the park was 61.55 19.03.21 The researchers measured a total of 23 plants. (a) Find the sample standard deviation sx for these measurements. Show your work. (b) A hasty reader believes that the interval given in the table is a 95% confidence interval for the mean height of willow plants in this region of the park. Find the actual confidence level for the given interval.

ANSWER:

Step 1 of 3

The table entry in biologists book:

He number of plants

 

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