Refer to Table 2 and comment on the shape of the distribution.
MATLAB: An Introduction with Applications
6th Edition
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Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
please help with 1,2,3.
Sample data are collected on the closing stock prices of Maman, Inc. Part of the
Table 2
Descriptive Statistics (Stock price in $) |
|||
|
16.41 |
Minimum |
6.29 |
|
16.83 |
Maximum |
18.86 |
Variance |
5.48 |
|
12.57 |
Standard Deviation |
2.34 |
Skewness |
-2.85 |
|
117 |
|
|
1. Refer to Table 2 and comment on the shape of the distribution.
Group of answer choices
The skewness is -2.85, indicating that the data are highly skewed to the left.
The mean and median are close, indicating that the distribution is symmetric.
The variance is 5.48, indicating that there is a large variability in the data.
The range is 12.57, indicating that the data are highly skewed to the right.
2. Assume the stock price has a bell-shaped distribution. Refer to Table 2 and use the empirical rule to state the percentage of stock prices between $14.07 and $18.75.
Group of answer choices
There are 99.74% of the stock prices between $14.07 and $18.75.
There are 95.44% of the stock prices between $14.07 and $18.75.
There are 50% of the stock prices between $14.07 and $18.75.
There are 68.26% of the stock prices between $14.07 and $18.75.
3. Refer to Table 2, based on the z-score, is the highest stock price, $18.86, an outlier?
Group of answer choices
The maximum value is 18.86, greater than all the other values. Hence it is an outlier.
The skewness is -2.85, indicating that the value is an outlier.
The z-score is 1.05. Hence, it is an outlier.
The z-score is 1.05. Hence it is not an outlier.
Expert Solution
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Step 1
The data is given on the closing stock prices of Maman.
The descriptive statistics from Excel are given.
Mean | 16.41 |
Median | 16.83 |
Variance | 5.48 |
sd | 2.34 |
n | 117 |
min | 6.29 |
max | 18.86 |
Range | 12.57 |
skewness | -2.85 |
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