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 %

2018年12月19日 · Measures Of Variation Statistics Math Help 12/19/18 The heights of American adult males are normally distributed with a mean of 177 cm and a standard deviation of 7.4 cm. Find the range of heights that contain approximately

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 …

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 %

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

2014年8月13日 · The F-ratio is a ratio of the variation between your treatments to the variation within your treatments. Or, put algebraically, F = (variation between treatments) / (variation within treatments). The within-treatment variation is the variation due to chance.

1330,1420,1510,1600,1690,1780,1870. Distribution of Prices. A) What is the approximate percentage of buyers who paid between $1510 and $1690?

2021年2月25日 · "A Statistics teacher wants to compare her two classes to see if they performed any differently on the test she gave that semester. Class A had 25 students with an average score of 70, standard deviation 15. Class B had 20 students with an …