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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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- **Column** | **Median** | **Std. dev.** | **IQR** | **Mean**
- **babymort** | 27.7 | 38.1 | 53.7 | 42.3
- **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 of x and y.
- b) Provide the interpretation of the slope. Give your answer as a complete sentence.
________________________________________________________________________________
________________________________________________________________________________
- c) Sometimes we can interpret the y-intercept, but sometimes we can't. In this problem, we can interpret the y-intercept. Provide the interpretation of the y-intercept. Give your answer as a complete sentence.
________________________________________________________________________________
________________________________________________________________________________
- d) Assume there is a country where about 50% of people can read with a baby mortality of 97. (= 97 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).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffe425fce-aef1-4708-93ba-8421c5a588a6%2Fc8ca9cf8-d1de-4d89-ab9b-bf25fd48f3cc%2F11yaztc_processed.png&w=3840&q=75)
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 percentage of the population aged 15 or older who can read and write. Babymort is the number of deaths of infants under one year old per 1,000 live births.
- a) Use the table to find the least-squares regression line, treating literacy as the explanatory variable and babymort as the response variable.
- **Column** | **Median** | **Std. dev.** | **IQR** | **Mean**
- **babymort** | 27.7 | 38.1 | 53.7 | 42.3
- **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 of x and y.
- b) Provide the interpretation of the slope. Give your answer as a complete sentence.
________________________________________________________________________________
________________________________________________________________________________
- c) Sometimes we can interpret the y-intercept, but sometimes we can't. In this problem, we can interpret the y-intercept. Provide the interpretation of the y-intercept. Give your answer as a complete sentence.
________________________________________________________________________________
________________________________________________________________________________
- d) Assume there is a country where about 50% of people can read with a baby mortality of 97. (= 97 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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