Answered: The number of planes to arrive at the…

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter1: Fundamental Concepts Of Algebra

Section1.1: Real Numbers

Problem 30E

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The number of planes to arrive at the Dubai International airport over N days were recorded and imputted into MINITAB for analysis. Exibit 1 was subsequently generated.

Exhibit 1

stem - and leaf display: no. of arrival

leaf unit = 1 N =*

5	2	01123
10	2	56899
* *	3	0001123
( * * * )	3	6666678888
12	4	01134
7	4	57789
2	5	00

i. Calculate the missing *, ** and ***

ii Find the value of the

a. Median

b. Highest value

c. Mode

Using the stem and leaf diagram in Exibit 1,

i. Form a frequency table by identifying the class intervals implicitly

Using the table created in 2ci) above

ii. calculate the sample mean

iii. calculate the sample variance

NB. please show all workings, preferably typewritten answer!

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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