correlation

The correlation coefficient for the age and blood pressure of 4 people taken randomly is given. Find t and test the significance of correlation coefficient r = 0.9478, use ∝ = 0.01 and n = 4. => 4.2, significant relationship or 1.2, no significant relationship or 1.2, signi..

What type of correlation does x and y have? => negative correlation or no correlation or cannot be determined or positive correlation..

Which of the following statement(s) is/are false? I. The coefficient of nondetermination is found by subtracting the coefficient of determination from 1. II. As the correlation coefficient approaches zero, the coefficient of determination increases more rapidly. III. The standard error of..

The formula for the t test using correlation coefficient r is => t = r n - 1 1 - r 2 , df = n - 2 or t = r n - 2 1 - r 2 , df = n - 2 or t = r n - 2 1 - r 2 , df = n - 1 or t = r n - 1 1 - r 2 , df = n - 1..

A sales manager wishes to know whether there is a relation between the number of sales persons and sales per day. Find correlation coefficient and test the significance of the correlation coefficient of the following data at ∝ = 0.01. No .of sales persons 2 7 1 3 8 3 4 9 2 ..

Which of the following statement(s) is/are true? I. The closer the observed values are to the predicted values, the larger the standard error of the estimate. II. The standard error of the estimate can be used for constructing a prediction interval about a y ′ value. III. By selecting an &alp..

From a team of baseball players 5 players were given a test on nutrition and their scores were compared to their performance during a season. The performance scale was 1-best and 10-worst. Calculate the correlation coefficient between the players performance and nutrition score. Player's ..

A teacher decides to examine the hypothesis between the test scores and the overall grade point average for each student for the whole year. Find t test value and test the significance of the correlation coefficient using the P-value method. r = 0.43, ∝ = 0.02, n = 5. => 0.0256, sign..

A teacher decides to examine whether a student's test score are related to his/her classroom performance. At the end of the academic year, she computes a correlation between the test score and the grade point average for the whole year. The data is provided here. Compute the correlat..

Calculate the correlation coefficient for the data shown and describe the relationship. x 43 40 44 42 41 45 43 44 y 44 43 40 45 43 42 40 44 => - 0.216; weak negative relationship or - 0.126; weak negative relationship or - 0.116; weak negative relationship or 0.116; weak positive relation..