What information is provided by r (the correlation coefficient)?

Q: A scatterplot is made of the yearly advertising budgets (x axis) and yearly revenues (y axis) of 200…

A: Given The data is as follows: Total no. of companies = 200 Correlation coefficient, r=0.3

Q: A sociologist hypothesizes that the number of gun shops in a city will be related to its violent…

A:

Q: kids emailhr prestige tvhours wwwhr kids 1         emailhr -0.02 1       prestige -0.09…

A: Which two variables are most strongly correlated?  Why do you think those two variables are highly…

Q: The correlation between R and T is the same as the correlation between T and R? Illustrate this?

A: Correlation coefficient - r: The Pearson’s product-moment correlation does not take into…

Q: A Pearson's r correlation coefficient is used to assess the relationship between two variables when…

A: The correct  option is A Continuous  ; continuous

Q: Question 9 The table and scatter plot below compares the age of a toddler (in months) with its…

A: X (Age) and Y (Months) values are given along with plotted graph.

Q: A study was done to determine the relationship between the alcohol content of beer, and the amount…

A: Given: n=9 α=0.05

Q: Q2. IV Arrange the correlations in increasing order: A. I, II, III, IV. B. III, II, I, IV. C. I, II,…

A:

Q: Is a correlation of 0.05 statistically significant?

A: No, the correlation is insignificant , it is very near to zero which suggest no correlation

Q: Now we denote the mean of X and Y as: E(X) = μx E(Y) = Hy Next from the definition of correlation we…

A: Given E(X)=μx and E(Y)=μy

Q: The scores obtained by students of Environmental Engineering have been recorded in two courses…

A:

Q: The value of correlation coefficient between variables X and Y lies between: A. 1 and 2 B. 0 and 1…

A: We have to identify correct option.

Q: If the correlation coefficient obtained from data pairs of variables X and Y is -0.74 the strength…

A: Correlation between two variables measure the strength and direction between two variables. It…

Q: Calculate Pearson's correlation coefficient r. Then explain the direction and strength of the…

A: Obtain the value of the correlation. The value of the correlation is obtained below as follows:

Q: The amount spent on groceries per week (y) and the number of household members (x) are shown below.…

A: Y = The amount spent on groceries per weekX = The number of household members N = 6X : { 2,3,3,4,1,5…

Q: H.W: The data describe the No. of doctor's work in Abn Sena hospital and the No. of Tour to their…

A: Given data is Tour No.(x) 6 8 6 11 9 2 7 5 8 Doctors No.(y) 4 5 3 6 5 4 5 2 6

Q: Choose the best correlation coefficient to describe each plot. Of the six correlation coefficients…

A:

Q: I wish to determine the correlation between the height (in inches) and weight (in pounds) of…

A: Given Data: Height Weight 70 160 69 164

Q: Roy is investigating how long his phone's battery lasts (in hours) for various brightness levels (on…

A: For the given data Correlation ( r ) =?

Q: Listed below are the overhead widths (in cm) of seals measured from photographs and the weights (in…

A: The data shows the overhead widths of seals and the weights.

Q: (c) Find the value of the correlation coefficient between systolic blood pressure and diastolic…

A: (c) Let x be the systolic blood pressure, and y be the diastolic blood pressure. The sums are, x…

Q: What is the relationship between the attendance at a major league ball game and the total number of…

A: (a)   Use EXCEL to obtain the value correlation coefficient r:   EXCEL procedure:   Go to EXCEL Go…

Q: Match the linear correlation coefficient to the scatter diagram. The scales on the x- and y-axes are…

A: From scatter plot here we have to find out scatter plot  r value which are represented correct r…

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: Detween the two vahables 588 ne value of the coefficient of determination? Round to four decimal…

A: We have given that,  Correlation coefficient (r) = 0.588 Then,  We will find the coefficient of…

Q: Kia assesses people's levels of gratitude and stress that occur naturally to determine if a…

A: An experimental design refers to how participants are allocated to the different conditions in an…

Q: When is the correlation coefficient zero?     It is never zero.     when there is no linear…

A: The objective is to find when is the correlation coefficient zero.

Q: A traffic officer is compiling information about the relationship between the hour of the day and…

A: correlation coefficient of -0.25.

Q: Annual high temperatures in a certain location have been tracked for several years. Let X represent…

A: We are given with the following data in the question: X Y 5 20.25 6 19.88 7 24.21 8…

Q: interpretation for the correlation coefficient: Variables being compared are age in years and…

A: It is given that the variables being compared are age in years and annual salary. The correlation…

Q: Using games won as the explanatory variable , do the following: (a) The correlation coefficient is r…

A: It is given that∑xi=743,∑yi=2223∑xi2=70927,∑yi2=618065∑xiyi=205719,n=8

Q: 2. The demand for hand sanitizers is off the charts due to this corona virus outbreak. People are in…

A: X:- 12, 13, 14, 15, 17, 18, 21, 25 Y:- 1000, 1550, 1600, 1800, 1900, 2200, 2700,          3500…

Q: (4) An emergency service wishes to see whether a relationship exists between the outside temperature…

A: a) Steps of create scatter Plot; 1. Enter the data in excel then, 2. Go to insert --- scatter plot…

Q: interpretation for the correlation coefficient: Variables being compared are age in years and…

A: It is given that the variables being compared are age in years and annual salary. The correlation is…

Q: Given that the linear correlation coefficient r is found to be 0.867, what is the proportion of the…

A: Here Given linear correlation coefficient =r =0.867

Q: Listed below are the overhead widths (in cm) of seals measured from photographs and the weights (in…

A: Correlation coefficient:The correlation coefficient in statistic is a measure the strength of linear…

Q: The command aov(x,y) can be used to calculate the correlation coefficient between x and y O True O…

A: aov(x, y) is used to find correlation between x and y  True  False

Q: The linear correlation coefficient r is. (Round to three decimal places as needed.) Do the results…

A: From the given data we find the scattered diagram and correlation coefficient.

Q: Which of the following correlation coefficient would reflect a conclusion made by a researcher that…

A: r = +.02 would reflect that the two variables would not be related.

Q: Match the linear correlation coefficient to the scatter diagram. The scales on the x- and y-axes are…

A:

Q: a. tau provides a better value of rank correlation as it is more related to rho b. non-parametric…

A: Rank correlation is a statistical dependence between the ranking of two variables. Rank correlation…

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.