Answered: A park ranger wants to know the mean…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Item 8

A park ranger wants to know the mean number of nights students in your school plan to camp next summer. The park ranger randomly surveys 10 students from each class. The results are shown.

Nights Camping

A: 0, 5, 2, 3, 0, 6, 0, 10, 3, 0

B: 14, 0, 0, 6, 5, 0, 1, 2, 2, 5

C: 8, 8, 2, 3, 4, 1, 0, 0, 0, 6

D: 10, 10, 5, 6, 1, 0, 0, 0, 4, 0

Question 1

a. Use each sample to make an estimate for the median number of nights students in your school plan to camp next summer.

Use all four samples to make one estimate for the median number of nights students plan to camp next summer.

The median of all the samples is nights.

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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