Question
Solution
Statement I: "In the simple linear regression model with an intercept, the regression slope when multiplied by the explanatory variable X will give the predicted Y." This statement is incorrect. In a simple linear regression model, the predicted value of Y is given by the equation y = β0 + β1X, The slope β1 when multiplied by X gives the change in Y for a unit change in X, but it does not give the predicted value of Y directly, we need to include intercept as well. Statement II: "In the simple linear regression model, the regression slope indicates by how many units Y increases, given a one-unit increase in X." This statement is correct. The slope β1in a linear regression model represents the change in the dependent variable Y for a one-unit change in the explanatory variable X.
Three numbers ‘L’, ‘M’ and ‘N’ are such that ‘L’ is five times of ‘M’ and ‘N’ is equal to the average of ‘L’ and ‘M’. I...
A bag contains 1 rupee, 50-paise, and 25-paise coins in the ratio 5 : 6 : 8. If the total amount is Rs. 240, find the number of 25-paise coins.
The sum of three numbers is 212. If the ratio of the first to the second is 3:5 and that of second to the third is 7:10 then the second number is?Â
Two numbers are in the ratio 8:5. After adding 4 and 7 to them respectively the ratio becomes 2:3. Find the bigger number.
Find the third proportion of 25 and 40.
The ratio between two numbers is 6:7. If each number is increased by 9, the ratio between then become 9:10, find the difference between numbers.
A sum of Rs.2400 is distributed among A, B, C in the ratio of 3:7:10. What is the total amount received by A and B?
The ratio of the weights of Arjun, Ravi, and Sameer is 7:6:5 respectively. The weight of Karan is 9 kg less than the weight of Arjun. If the difference ...
Three numbers are in ratio 3:5:6. If the sum of the squares of those three numbers is 280 then find the sum of the three numbers.
'A', 'B' and 'C' distributed Rs. 1350 among themselves in the ratio 5:2:3, respectively. 'A' gave some amount to 'B' such that new amount with 'B' is tw...