In order to test average litter size for different breeds, a sample of 25 litter sizes was taken from Abyssinian Cats and a sample of 31 litter sizes was taken from Chinchilla Cats. Abyssinian Cats had a sample average of 3.5 kittens and Chinchilla Cats had a sample average 2.8 kittens. Further, Abyssinian Cats have a known standard deviation of 1.5 kittens and Chinchilla Cats have a known standard deviation of 1.9 kittens. Test to see if there is a statistically significant difference between the average litter sizes of these cat breeds using a 5% level of significance. Should you reject the null hypothesis that there is no difference between the mean litter sizes of the two cat breeds? Or is there not enough evidence to support that the mean litter sizes are different?

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α.part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part bsuppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i. e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part cnow try a numerical problem. what is the direction of the vector w = < -1, 6 > ?