Question

researchers measured the tail width and body length of 49 whales. the correlation coefficient of the relationship between the two measures is 0.3932. what does the correlation coefficient mean for this data set? a there is strong evidence that a whale with a shorter body has a wider tail. b there is weak evidence that a whale with a shorter body has a wider tail. c there is strong evidence that a whale with a longer body has a wider tail. d there is weak evidence that a whale with a longer body has a wider tail.

Explanation:

El coeficiente de correlación está entre - 1 y 1. Un valor cercano a 1 indica una correlación positiva fuerte, un valor cercano a - 1 indica una correlación negativa fuerte y un valor cercano a 0 indica una correlación débil. Aquí, el coeficiente de correlación es 0.3932, un valor positivo pero no muy cercano a 1, lo que significa que hay una correlación positiva débil. Esto implica que hay evidencia débil de que una ballena con un cuerpo más largo tenga una cola más ancha.

Answer:

D. There is weak evidence that a whale with a longer body has a wider tail.