Answered: Calculate to two decimal places (a) the…

Calculate to two decimal places (a) the mean of their masses. (b) the standard deviation of their masses. (c) the median of their masses.

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter11: Data Analysis And Displays

Section: Chapter Questions

Problem 5CR

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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

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Calculate to two decimal places
(a) the mean of their masses.
(b) the standard deviation of their masses.
(c) the median of their masses.

The masses, measured to the nearest kg , of some boys were recorded as shown.
Mass, kg
30 – 35
36 – 41
42 – 47
48 – 53
54 - 59
60 – 65
No of Boys
66
20
44
47
15
8

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