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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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Transcribed Image Text:1. (By HAND) From the Excel file World 95.xls, we would like to study the relation between literacy and
baby mortality (babymort). Literacy is the % of population of age 15 or old who read and write. Babymort is
the number of deaths of infants under one year old per 1,000 live births.
Use the table to find the least-squares
a)
regression line, treating literacy as the
explanatory variable and babymort as the
Column
Median
Std.dev. IQR
Mean
babymort
27.7
38.1
53.7
42.3
response variable.
literacy
88.4
22.9
36.8
78.3
Correlation between literacy and babymort is:
-0.90049313
Answer:
Use 1 decimal place for both the slope and y-intercept. Use literacy and babymort instead x and y.
b)
Provide the interpretation of the slope. Give your answer as a complete sentence
c)
Sometimes we can interpret y-int, but sometimes we can't. In this problem we can interpret the y-int:
Provide the interpretation of the y-int. Give your answer as a complete sentence.
Assume there is a country that about 50 % of people can read with the baby mortality of 97. (= 97
d)
babies out of 1000) What is the residual for this country ? (make sure that the input is 50, not 0.5)
Is the baby mortality of the country above or below average for countries with about the same literacy?
Answer: Residual
Above / Below_ (circle your answer).
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