Probability and Statistics

Find the Mean. 

Manny wants to know how many students at CTMS enjoy solving math problems. What is the best sampling method?

If a set of data has a symmetric distribution, the most appropriate measure of center and variation to use is...

What is the difference in the IQRs?

If the probability of an event is 1, then it is _________.

This board game spinner is divided into sections of equal size. What is a reasonable estimate of the number of times the spinner will land on a section labeled 5 over the course of 150 spins?

Suppose you have a bag that contains 4 black, 3 green, 1 red, and 2 orange marbles. Find P (not orange). Express your answer as an exact decimal.

(a)  

Suppose you have a bag that contains 4 black, 3 green, 1 red, and 2 orange marbles. Find P (green or red). Express your answer as an exact decimal.

(a)  

You roll a fair number cube. Classify the event as either unlikely, likely, or neither unlikely nor likely: "Rolling a 3"