| variance of X

Q: A positive correlation coefficient means that there is a relationship between two variables. O Zero…

A: Correlation - Is a mathematical measurement of degree of association between two variables. Positive…

Q: What are four main functions of statistics?

A: Find: The four main functions of statistics.

Q: Differentiate Mean from Variance. What is their similarities and differences? (Essay form)

A: Here we need to differentiate mean from variance.

Q: correlation coefficient close to zero is a strong indicator of a positive linear relationship…

A: Correlation is used to measure the relationship between two quantitative variables. The range of…

Q: To estimate the value of a dependent variable based on the values of one or more independent…

A: Solution-: To estimate the value of a dependent variable based on the value of one or more…

Q: Consider the variable X whose mean and variance are given respectively by Hx = 27.2 and Var(X) =8.…

A: GivenμX=27.2Var(X)=8

Q: How do you calculate a coefficient of correlation of two indexes’ returns?

A: Let the two indexes’ returns be A and B.The coefficient of correlation measures the degree to which…

Q: Distinguish Conditional Variance from Conditional Mean

A: Conditional Expectation: The conditional expectation or conditional mean of  random variable is the…

Q: The correlation coefficient always moves between 0 and 1. True or False.

A: The correlation coefficient can be negative, zero or positive.

Q: Give examples of two variables that have a perfect positive linear correlation and two variables…

A: We know that Perfect positive linear correlation: When correlation coefficient value is +1 then the…

Q: Explain the physical significance of auto correlation.

A:

Q: correlation

A: It is asked to find which implies a stronger linear relationship a correlation of +0.4 or a…

Q: True or False: Collinearity is present when there is not a high degree of correlation between any of…

A: Collinearity is present when there is not a high degree of correlation between any of the…

Q: if var(2x) = 16 then the standard deviation of x= Answer: 2

A: The variance is calculated as Var(ax)=a2Var(x)

Q: true or false If the number of flowers in a field is negatively correlated with the number of…

A: We know that if their is negative correlation between two variable then, decreases of one variable…

Q: Define P-value?

A:

Q: sum of squared residuals?

A: Sum of square residual is also known as error sum of square. It is calculated by subtracting the…

Q: In linear regression, the mean value of all residuals will be greater for a correlation of -.70 than…

A: The mean (or expected) value of all residuals will be greater for correlation of -0.70 than for a…

Q: True or false: the correlation coefficient between height in inches and height in centimeters is 1.

A:

Q: The "true" variance is also the population variance True False

A: # Relation between True varience and population varience ?

Q: Interpret the coefficient of correlation “r” in your word

A: The coefficient of correlation is a unitless measure of the strength of the linear relationship…

Q: If the variance of the sum is Var(X+Y) = 6 and Var(X) = Var(Y) = 4, then what is the correlation…

A: given data  Var(X+Y) = 6 Var(X) = Var(Y) = 4 corr(X,Y) = ?

Q: The correlation coefficient may assume any value between ?

A: The correlation coefficient between the two variables gives the linear relationship between the two.…

Q: A negative value of the correlation coefficient indicates that the variables are unrelated. O true O…

A: Negative Correlation :  If the  change in the value of one variable results in the change of value…

Q: A researcher is interested in the correlation between number of past romantic partners X and current…

A: The question is about regression Given : Coefficient of non determination = 0.78   To find : % of…

Q: Coefficient of variation is ascertained by: a. Standard Deviation/Mean X 100 b. Mean/Standard…

A:

Q: The Linear correlation coefficient r is the slope of the line. False True

A: statement : The Linear correlation coefficient r is the slope of the line.  we have to identify the…

Q: True or False The correlation coefficient is a measure of thestrength of a linear relation between…

A: The correlation coefficient is a measure of the strength of a linear relationship between two…

Q: Describe about the Linearity as correlation coefficient assumption.

A: The assumptions for correlation coefficient are as follows: 1) Level of measurement. 2) Related…

Q: The first three moments of a distribution about the value 2 of.the variable are 1, 16 and – 40. Show…

A:

Q: What are four main functions of statistics?

A:

Q: How to find the variance, explain the formula

A: Mean:Mean is a measure of center in case of quantitative data. Mean of a data set is the sum of the…

Q: Define Bivariate Relationships?

A: Bivariate Relationship is a common statistical method.

Q: How to find the weighted mean of three models

A: The weighted mean is given by the following formula

Q: Find how to distribute the variance and standard deviation calculations across the nodes. Variance…

A: In statistics, variance is a measure of how the data points differ from the mean value. It measures…

Q: If the maximum 1.3, п %3D 150, аnd %3D Zo.005 = 2.575, then find the variance variance 6.2. О %3D…

A: Given,maximum =1.3n=150Z0.005=2.575

Q: Where does the spurious correlation exist?

A: In day-to-day life, we may all come across some situation where 2 factors are related. For example…