What is another form of expressing beta1 in a simple linear regression? y=dependent variable x=independent variable

Which of the following numbers (measures of kurtosis of a distribution) would represent a platykurtic distribution?

Which of the assumptions is not one of the assumptions for creating a linear regression model (ie. Gauss-Markov Assumptions)?

The variance of X is 5 and the variance of Y is 8. What is the variance of X+Y?

A survey was conducted to find the average weight of students living in the dorms or a university. To help improve the accuracy of the study, an equal number of students were randomly selected from each dorm for the sample. This sample is an example of what?

Which of the following would be appropriate for a t-test?

An auto analyst is conducting a satisfaction survey, sampling from a list of 10,000 new car buyers. The list includes 2,500 Ford buyers, 2,500 GM buyers, 2,500 Honda buyers, and 2,500 Toyota buyers. The analyst selects a sample of 400 car buyers, by randomly sampling 100 buyers of each brand. Is this an example of a simple random sample?

Suppose E and F are events in a sample space S. Suppose further that E has probability .2, F has probability .6, and the intersection of E and F has probability .1. What is the probability of the union of E and F?

In hypothesis testing, which of the following statements is always true?

Suppose A is always 3. Var(B)=4. What is Var(A+B)?

What is derived from the third moment of distribution?