Answered: Suppose a sample of 9 adult eastern…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Suppose a sample of 9 adult eastern gray squirrels is sampled from 9 various, random
locations in a large area. The weights of the squirrels (in ounces) is shown below:
18 16.3 17.1 17.8 21 14.7 17.2 17.3 18.1
a) Find the mean, median, and standard deviation of the squirrel weights in the
sample.
b) Show that the necessary conditions (Randomization Condition, 10% Condition,
Nearly Normal Condition) are satisfied to construct a confidence interval. Briefly
explain/show how each condition is satisfied.
c) Find the 98% confidence interval for squirrel weights in the area. (To show your
work: Write down which calculator you are using and what values you are entering
into the calculator.)

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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