Do Now #5: Normal Distributions Suppose the mean weight (in pounds) of a newborn elephant is 200 pounds with a standard deviation of 23 pounds. (Lesson.

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Presentation transcript:

Do Now #5: Normal Distributions Suppose the mean weight (in pounds) of a newborn elephant is 200 pounds with a standard deviation of 23 pounds. (Lesson 23.2) 0. Find the percent of elephants that are between 177 and 223 pounds. 1.Find the percent of elephants that are no more than 212 pounds. 2. Find the percent of elephants that are no more than 205 pounds. 3. If you take a sampling of 15 elephants, what is the probability that your sample has a mean weight of up to 198?

Using Excel to find “p” Type “=norm.dist(x,mean,standard_dev, true) X=the random variable you're interested in Mean is the number of the mean Standard_dev= the number of the standard deviation Do Classwork worksheet. Due a the end of class For each question 1.Draw the curve 2.Shade area of interest 3.Find z-score 4.Specify p-value using table and excel

23.3 Sampling Distribution Page 1141

Simulation Sample distribution is a small sample from the population Find the mean of SEVERAL samples Find the Standard deviation of the sample means

Answer Reflection questions (Page 1143)

Distribution of Sample Proportions Students find the proportion of females from page 1143 Plot the different proportions

PAGE 1143 EXPLORE 2 The sheet of papers I gave you We will use Excel. We will use Excel. Mean: ______ Standard Deviation: _________

Sample Distribution & Central Limit Theorem The Histograms we just made. The standard Deviation of the sampling distribution is called the standard error of the mean.

Sampling Distribution of Sample Proportions

Page 1145

DO: Your turn #6-#7 Page

Explain 2 (Page 1146)

DO: Your turn #8-9 Page Elaborate 10-13

Conclusion Finish all Your turns Complete questions #1-6 on page 1159 Finish for homework if you do not finish in class. Homework: 1. Online or in the Book Evaluate (Go on website to find numbers) 2. Module 23 Assessment Readiness (Page 1160)