1. Term 1 Week 7 Warm Ups

2. Warm Up 9/22/14 1.Students were asked to measure the width of their desks in centimeters. Identify the outlier, and describe how it affects the mean and the standard deviation. 49, 50, 49, 48, 49, 19, 50, 49, 48, 50, 49, and 50 2. Scores on a test are normally distributed with a mean of 81.2 and a standard deviation of 3.6. Find the probability that a randomly selected student scored above 88.4.

3. Warm Up 9/23/14 1.Give the percent of area under the normal curve represented by the arrows: 2. A tax preparer claims an average refund of $3000. In a random sample of 40 clients, the average refund was $2600, and the standard deviation was $300. Is there enough evidence to reject the claim?