What is the cumulative probability at -1 standard deviation for a normal distribution?

Suppose E and F are independent events in a sample space S. Suppose further that E has probability .3 and F has probability .4. What is the probability of the union of E and F?

Suppose E and F are events in a sample space S. Suppose further that E has probability .5, F has probability .6, and the intersection of E and F has probability .2. Find the probability of the union of E and (the complement of F).

Is it true that nCr = nC(n-r) ?

The Causal Research design is used when the .... factor about some phenomenon or issue is being researched.

Prior experience and situational analysis are important in making decisions when a person does not have enough information to calculate the probability of occurrence of an event.

A manager of a large bank wants to compute the average interest rates across all bonds that the bank invests in. The manager randomly sampled 127 bonds that the bank invests in and calculated the average interest rate over the past year of the sample was 2.47%. What is the parameter of interest in this study?

A bag contains 4 balls (2 red and 2 blue). You pull out one ball at a time without replacement. What is the probability that the fourth ball chosen is a red ball?

The center line inside a box plot typically represents the _____ in any instance.

Suppose you have generated this model to predict income: Income = 10 + .5(Years of Education), units are in thousands, ie 10.5 = $10,500. Interpret Beta1.

What is the formula for the variance of a population?