2024年5月7日 · Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported as y=-91.75⁢x+82.09and the r=-0.54. What proportion of the variation in y can be explained by the variation in the values of x?

2023年12月1日 · The coefficient of determination r^2 represents the proportion of the variation in the dependent variable y that can be explained by the independent variable x in a regression model. In this case, r = -0.031, so r^2 can be calculated as follows: r^2 = (-0.031)^2 = 0.000961 . To express this as a percentage, multiply by 100:

2019年4月10日 · years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let . sigmaσequals= 18.1. years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want . 99 %

2023年4月5日 · The ages of a group of 123 randomly selected adult females have a standard deviation of 17.1 years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let …

2018年12月19日 · 3 Answered Questions for the topic Measures Of Variation ... Measures Of Variation Statistics Math Help ...

2019年8月24日 · years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let . sigmaσequals= 16.4. years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want . 99 %

2019年3月14日 · Hi Moriah, Though the two data sets have the same mean, the second data set has a higher standard deviation. This means that scores in that data set will be more spread out around the mean value of 50 compared to the first data

Reginald J. asked • 10/02/16 Find the constant of variation k for the stated condition. Y varies inversely as the square of x, and y=3 when x=2

2023年11月28日 · Remember that a simple linear regression equates essentially to a slope, so we follow the traditional slope-intercept form y=mx + b. You may see this in statistics as Y=B 0 + B 1 x. They are essentially the same. The b in the first form is the y-intercept. B 0 in the second form is the y-intercept. m in first form is slope. B 1 in second form ...

2021年1月25日 · direct variation means y=kx for some real number k. x/y = 20. multiply both sides by y. x=20y, divide by 20. y= (1/20)x k= 1/20 = 0.05