The blood pressure and weight if Jellystone Park bears are correlated and .6 is the correlation coefficient of blood pressure with weight . The average blood pressure is 150 with variance 58.3 for Jellystone Park bears. For a randomly selected bear if we predict its blood pressure is 150 before weighing it , what is our expected squared error?

Q: The mean of 5 observations is 4.4 and the variance is 8.24. If three of the five observations are…

A: Given: Number of observations (n) = 5 Mean x¯=4.4 Variance (s2) = 8.24 The three observations are 1,…

Q: Listed below are numbers of Internet users per 100 people and numbers of scientific award winners…

A: The question is about correlation Given :   To find : 1 ) Value of linear correlation coeffi. 2 )…

Q: 1 2 13 r= 4 5 9 3 8 6 5 Calculate the sample correlation coefficient (r) to three decimal places.…

A:

Q: The population data has a correlation of .60. What is the probability that you will get a sample…

A: Introduction: Suppose r is the sample correlation coefficient between two variables, based on a…

Q: Find the value of the linear correlation coefficient r. Two different tests are designed to measure…

A: Given data, X Y X*Y X*X Y*Y 23 49 1127 529 2401 25 53 1325 625 2809 28 59 1652 784 3481…

Q: The researchers hypothesized that there would be a correlation between how much people studied and…

A: Solution: From the given information, the researchers hypothesized that there would be a correlation…

Q: The range and the variance are both measures of distance.

A: Solution-: The range and the variance are both measures of distance.

Q: Suppose the variance of X is 95. What is the variance of .09X?

A: The objective of this question is to find the variance of a variable that has been scaled by a…

Q: Provide an appropriate response. Given the size of a human’s brain, x, and their score on an IQ…

A: We know that the  Correlation measure the linear association between the variables i.e. it finds…

Q: A research conducts an analysis of variance. The data produces SStotal = 80 and SSwithin = 30. For…

A: Given SStotal=80SSwithin=30

Q: Which of these statements is best?       The variable to be predicted is the independent variable.…

A: Which of these statements is best?       The variable to be predicted is the…

Q: A researcher is trying to determine if racial background affects income. In a sample of 100 people,…

A: From the above data What proportion of the variance in income can be explained by racial background…

Q: A researcher finds a significant positive correlation of r = .63 between the amount of time spent…

A: A researcher finds a significant positive correlation of r = .63 between the amount of time spent…

Q: The mean of 5 observations is 4.4 and the variance is 8.24. If the three of the five observations…

A:

Q: Yessica thought that there was a correlation between the amount of time students slept the evening…

A: From the given information assume that x defines the sleep time the evening before the final exam…

Q: Provide an appropriate response Given the length of a Human’s femur, x, and the length of a human’s…

A: Positive correlation When there is an increase in one variable then other variable also increase.…

Q: The average lateness for one of the top airline companies is 10 minutes. The variance of the…

A: Given,mean(μ)=10standard deviation (σ)=9  =3and X=13

Q: 50 30 20 8 10 12 14 16 O 0.68 O -0.87 O -0.15 0.63 0.98

A:

Q: The average number of newspapers for sale in an airport newsstand is 12, and the variance is 25. The…

A: We have given that  Average and variance for newspapers.  Average = 12 Variance = 25 Standard…

Q: A study was done asking people how much money they spend per month on their natural gas bill and how…

A: Solution:  Given information: The correlation coefficient r= 0.94  The P value for the correlation…

Q: For a data set of brain volumes ​(cm3​) and IQ scores of ten ​males, the linear correlation…

A: Here the p-value indicates the probability of linear correlation coefficient is 38.4%

Q: Report the correlations between the three independent variables (age, educ and Protestant) and your…

A: The correlation is used to estimate whether there is any significance relationship between the two…

Q: A negative correlation indicates: the values on the two variables being analyzed move in opposite…

A: We have to find correct answer..

Q: If the correlation is .8, then 40% of the variance is explained?

A: The given statement is incorrect.

Q: Yessica thought that there was a correlation between the amount of time students slept the evening…

A:

Q: A researcher measures GPA and height for a group of high school students. What kind of correlation…

A: We have the  given statement  A researcher measures GPA and height for a group of high school…

Q: Given mean = 50, median = 48 and coefficient of skewness = 1. Find the value of the variance

A: A measure of central tendency is a single value that attempts to describe a set of data by…

Q: Here is a scatterplot. Give an estimate for the correlation coefficient r and explain how you made…

A: Correlation: Correlation determines the strength and direction of the linear relationship between…

Q: Two social scientists wanted to know if more violent crimes are committed when the temperature goes…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: The average number of students in the college of business is 56, with a variance of 5. The…

A: GivenMean(x)=56Varaince(σ2)=5standard deviation(σ)=5=2.2361Median  was greater than mean by

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.