Suppose Tatiyana is interested in the relationshipbetween language ability and time spent reading. She120-randomly selects a sample of 30 students from thelocal high school and collects their scores from a을 100-E 80-language aptitude test. She surveys the sample askingeach student how many hours per month he or she60-spends reading.40-Using the sample data, Tatiyana produces a scatterplot20-with reading time on the horizontal axis and languagetest scores on the vertical axis. She develops a least10152025squares regression equation where x is the amount ofReading time in hourstime spent reading during the month and ŷ is thepredicted value of the language test score.ŷ = 3.251x + 31.237Compute the value of ŷ when a student spends 35 hours reading. Give your answer precise to one decimal place. Avoidrounding until the last step.ŷ =pointsIdentify all of the true statements regarding the interpretation of ŷ when x = 35. The value of ŷ isthe language test score that predicts the reading time to be 35 hours.an unreliable prediction of a language test score because the value of 35 hours is outside the scope of the model.a predicted value of the language test score if a student reads for 35 hours.the language test score that any student who reads for 35 hours will obtain.the predicted number of students that read for 35 hours.Language test score in points

The variable y represents the 'language test score in points' and the variable x represents the…

Compute the value of ŷ when a student spends 35 hours reading. Give your answer precise to one decimal place. Avoid rounding until the last step. ŷ = points Identify all of the true statements regarding the interpretation of ŷ when x = 35. The value of ŷ is the language test score that predicts the reading time to be 35 hours. an unreliable prediction of a language test score because the value of 35 hours is outside the scope of the model. a predicted value of the language test score if a student reads for 35 hours. the language test score that any student who reads for 35 hours will obtain. the predicted number of students that read for 35 hours. O O O

Compute the value of ŷ when a student spends 35 hours reading. Give your answer precise to one decimal place. Avoid rounding until the last step. ŷ = points Identify all of the true statements regarding the interpretation of ŷ when x = 35. The value of ŷ is the language test score that predicts the reading time to be 35 hours. an unreliable prediction of a language test score because the value of 35 hours is outside the scope of the model. a predicted value of the language test score if a student reads for 35 hours. the language test score that any student who reads for 35 hours will obtain. the predicted number of students that read for 35 hours. O O O

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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Concept explainers

Correlation

Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.

Question

Suppose Tatiyana is interested in the relationship
between language ability and time spent reading. She
120-
randomly selects a sample of 30 students from the
local high school and collects their scores from a
을 100-
E 80-
language aptitude test. She surveys the sample asking
each student how many hours per month he or she
60-
spends reading.
40-
Using the sample data, Tatiyana produces a scatterplot
20-
with reading time on the horizontal axis and language
test scores on the vertical axis. She develops a least
10
15
20
25
squares regression equation where x is the amount of
Reading time in hours
time spent reading during the month and ŷ is the
predicted value of the language test score.
ŷ = 3.251x + 31.237
Compute the value of ŷ when a student spends 35 hours reading. Give your answer precise to one decimal place. Avoid
rounding until the last step.
ŷ =
points
Identify all of the true statements regarding the interpretation of ŷ when x = 35. The value of ŷ is
the language test score that predicts the reading time to be 35 hours.
an unreliable prediction of a language test score because the value of 35 hours is outside the scope of the model.
a predicted value of the language test score if a student reads for 35 hours.
the language test score that any student who reads for 35 hours will obtain.
the predicted number of students that read for 35 hours.
Language test score in points

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