We found for families with two children, the mean number of girls is 1.0 and the standard deviation is 0.7 girls. Use those values to find the maximum and minimum usual values for the number of girls. Will 2.5 be unusual?

A student decided not to study for his Statistics test consisting of 12 questions. He said I will probably do well, since its multiple choice and I have ¼ chance of getting the answer right. Without reading the test he decides to bubble in at random. What is the probability he gets all of the questions right? The first 10 right? 4 right in total?

Intuitive Addition Rule. To find P(A or B), find the sum of the __________ event A can occur and the number of ways event B can occur, adding in such a way that ____________ is counted only ______. P(A or B) is equal to that sum, divided by the total number of outcomes in the sample space.

If you know that there is an 87% chance of winning a game. Find P(A) and P(A’).  Small Hint

Use the Range Rule of Thumb for Interpreting a Known Value of the Standard Deviation

 For the 40 Chips Ahoy cookies, find the percentile for a cookie with 27 chips. (Use Chart below)  

Which of these measures is affected by outliers and why

 Find the sample standard deviation of 12,23,16

 Estimate the mean from the IQ scores 50-89 in the table below:

Find the weighted Mean of a class that has the following grade structure 1 Final worth 35% of the grade, Grade= 80 4 Test worth 25% of the grade, Grade= 75 8 HW worth 30% of the grade, Grade = 70 4 quiz worth 10% of the grade, Grade = 80