Linear Regression Calculator

This linear regression calculator uses the least squares method to find the line of best fit for a set of paired data. The line of best fit is described by the equation f(x) = Ax + B, where A is the slope of the line and B is the y-axis intercept.
All you need to do is enter paired data into the text box, each pair of x and y in a separate line (row).

Also, the coefficient of correlation is calculated as the Pearson product-moment correlation coefficient (PPMCC or PCC or R). The Pearson correlation coefficient measures the strength of a linear association between two variables, where the value R = 1 means a perfect positive correlation and the value R = -1 means a perfect negative correlation.

Practice problems from statistics:

The data
The data set represents the number of cars in a town given a speeding ticket daily for ten days. 2 4 5 5 7 7 8 8 8 12 What is the IQR?
Measuring data
We gradually measured the values of 3,8,13,10,1,13,10,5,3,9. Calculate how much is the sum of the median and average of this file from the mode of this file.
Sport shooting
During sport shooting with a small-bore rifle, the following scores were achieved in one series: 9, 9, 8, 9, 10, 6, 8, 9, 9, 10, 8, 7, 6. a. Arrange the values in order of size. b. Construct a frequency distribution table and calculate the relative freque
75th percentile (quartille Q3)
Find 75th percentile for 30,42,42,46,46,46,50,50,54
Decile
Find the 5.5th decile of the data: 62, 60, 37, 57, 55, 59, 57, 50, 49, 61
The median 2
Here is a list of numbers: 9.9, 5.9, 3.6, 6.2, 8.9, 0.7, 4.4, 6.7, 9.9, 0.7 State the median. Give your answer as a decimal.
Find mean
Find the mean of two numbers: -4 and 5 (the first is negative four).
A Gallup
A Gallup poll investigated whether adults in Mumbai preferred staying at home or going out as their favorite way of spending time in the evening. Out of the 500 adults, the majority of adults (70%) indicated that staying at home was their favorite evening
A batsman
A batsman scored the following number of runs in seven innings 35,30,45,65,39,20,40. Find the mean, median, and range.
Increase the mean
To which number should the number 4 be changed between the numbers 4,5,7, 1,0,9,7,8, -3,5 to increase these numbers' arithmetic mean by 1.25?
Harmonic HM example
Find the harmonic mean of 4 and 8.