correlation

The age and the systolic blood pressure (in mmHg) of 10 people are given here. Find the correlation coefficient and describe the relation between them. Age 42 62 46 38 42 56 54 48 60 36 Systolic Blood pressure 124 148 124 112 140 145 148 144 154 115 => + 0.871; strong positive relationshi..

The supply and price of an item are shown here. Supply (tonnes) 10 20 30 40 50 60 70 80 90 100 Price ($) 100 75 50 40 30 25 20 15 12 10 Calculate the correlation coefficient and describe the relationship between them. => + 0.12; weak positive relationship or - 0.12; weak negative relation..

The scores of 10 students in mathematics and statistics examination are shown in the table. Calculate the coefficient of correlation between these two subjects and describe the relationship. Student A B C D E F G H I J Scores in Mathematics 86 96 72 99 90 88 93 78 82 86 Scores in statisti..

The average temperature (in °F) and precipitation (in cm) in 9 places of a state in the month of April-2005 are shown. Average temperature (in °F) 46.7 45.1 45.2 49.2 49.2 50.6 50.7 50.9 50.9 Average precipitation (in cm) 0.67 1.65 0.73 2.48 2.77 2.04 3.12 3.54 2.23 Find the correlatio..

The coach of an NBA team wanted to know the relationship between the heights of his players and the average points scored by them in each game. After certain rounds of games he had this data. Player A B C D E F G H I J Height (in inches) 71 78 79 80 82 84 81 81 74 80 Points (avg/game) 13.6 27.6 15...

The grade point average of 10 students in two subjects are as follows: Subject I 2.0 2.1 2.2 3.8 3.1 3.4 2.1 2.3 2.5 2.6 Subject II 2.2 2.4 2.0 3.4 2.9 3.6 2.0 2.6 2.7 2.4 Find t test value and test the significance of the correlation coefficient using the P-value method for this data. Us..

Given r yx 1 = 0.618, r yx 2 = 0.782 and r x 1 x 2 = 0.764. Find the value of the multiple correlation coefficient R. => 0.618 or 0.783 or 0.738 or 0.612..

The university authorities wanted to predict a student's grade on a statistics midterm score based on his/her SAT scores. Determine the correlation coefficient and the equation of the regression line for the data and predict the value of y ′ when x = 900. Test the hypothesis that th..

The formula for the F test used to test the significance of the multiple correlation coefficient R using n the number of data sets and k the number of independent variables and d.f. N = n - k , d.f. D = n - k - 1 is => R 2 ( n - k ) 1 - R 2 ( n - k - 1 ) or 1 - R 2 ( n - k ) R 2 n or R..

An educational researcher wants to find the relationship between studying hours ( x 1 ), playing hours ( x 2 ) and test scores ( y ) of the students of grade 5. Determine (i) the multiple correlation coefficient, (ii) the coefficient of multiple determination and (iii) the residual variat..