Warm Up A 2005 survey of 1000 randomly selected adults asked their most favorite and least favorite subjects in school. The most popular choice in both.

Slides:

Advertisements

Similar presentations

Two sample Tests & Intervals on the Calculator. Two independent random samples of women’s clubs in a particular city are taken in order to determine the.

Advertisements

Business Statistics - QBM117 Revising interval estimation.

Two sample Tests & Intervals on the Calculator. Two independent random samples of women’s clubs in a particular city are taken in order to determine the.

Section Copyright © 2014, 2012, 2010 Pearson Education, Inc. Lecture Slides Elementary Statistics Twelfth Edition and the Triola Statistics Series.

Do Now For a sample of 20 songs, the average song length is 3.5 minutes with a standard deviation of 0.5 minute. Construct a 90% CI for the population.

Section 8.2 ~ Estimating Population Means Introduction to Probability and Statistics Ms. Young.

Section 6.3: How to See the Future Goal: To understand how sample means vary in repeated samples.

Dolphins “R” Us It’s Who We Are!! BrittanyLindsayNicholeChristina.

Interpreting Estimates Intervals for Proportions Intervals for Known Sigma Intervals for Unknown Sigma Sample Size

Lesson 7 Confidence Intervals: The basics. Recall is the mean of the sample and s is the standard deviation of the sample. Where μ is the mean of the.

MATH Section 7.2.

Chapter 7 – Confidence Intervals

Estimating Population Means (Large Samples)

Two sample Tests & Intervals on the Calculator

SSF1063: Statistics for Social Sciences

HOW LONG DO STUDENTS IN MS. MATHEW’S CLASS PREPARE FOR A MATH TEST?

Math 21 Midterm Review Part 1: Chapters 1-4.

Construct a probability distribution and calculate its summary statistics. Then/Now.

Confidence Interval of the Mean – Population St. Dev Unknown

CHAPTER 11 CHI-SQUARE TESTS

Statistics Chapter 9: Inferences Based on Two Samples: Confidence Intervals and Tests of Hypotheses.

MATH 2311 Section 7.4.

Unit 12: Statistics.

Lecture Slides Elementary Statistics Twelfth Edition

Warm Up A recent study found that 79% of U.S. teens from years old use Snapchat. Suppose samples of 100 U.S. teens from years old are taken.

Warm Up A 2005 study took a random sample of scientists in the natural sciences and a separate random sample of scientists in the social sciences. Each.

MATH 2311 Section 7.4.

Final Exam will be 24 Questions (22 at 4 points, 2 at 6 points)

MATH 2311 Section 7.4.

Goodness of Fit Tests The goal of χ2 goodness of fit tests is to test is the data comes from a certain distribution. There are various situations to which.

Central Limit Theorem General version.

2) Using the data in the table above, compute the sample mean.

Estimating 1 – 2 and p1 – p2 Section 9.4.

Elementary Statistics: Picturing The World

Unit 12: Statistics.

ESTIMATION OF THE MEAN AND PROPORTION

Section 8.1 Day 4.

Warm Up Serena Williams and Novak Djokovic both competed at the US Open for tennis last week. Serena can serve a ball at 121 mph while Novak can serve.

Turn in homework & Enjoy your WINTER BREAK

You will be given the answer.

8.3 Estimating Population Proportions

Social Media in Schools

WARM – UP 1. Phrase a survey or experimental question in such a way that you would obtain a Proportional Response. 2. Phrase a survey or experimental.

Warm Up A recent study found that 79% of U.S. teens from years old use Snapchat. Suppose samples of 100 U.S. teens from years old are taken.

Warm Up Assume you are flipping 4 regular coins. Assign a point value of head=1 tail=0 to each of the coins. Construct a histogram of the outcome of many,

Comparing Two Proportions

March 24, Math 102 OBJECTIVE: Students will be able to determine the best method of collecting data from a population in order to predict outcomes.

Unit 6 - Comparing Two Populations or Groups

Chapter 7 Lecture 3 Section: 7.5.

Chapter 5 Normal Probability Distributions.

Determining Which Method to use

8.3 Estimating a Population Mean

Warm Up A nationwide survey found that the mean number of hours per week a parent volunteers at their child’s elementary school is 4.5. The median was.

Estimating 1 – 2 and p1 – p2 Skill 35.

MATH 2311 Section 7.4.

DG 24 (LAST ONE) minutes Day 57 Agenda: DG 24 (LAST ONE) minutes.

Warm Up A 2007 paper examined the effects of logging on the local squirrel population. Plots of land, each 9 hectares in area, were randomly assigned to.

Warm Up A Gallup poll asked 1600 adults in the U.S. “Did you attend church in the past 7 days?” 715 people said yes. Assume the survey used a simple.

Pg. 637 # ) A.(18.9,25.1) We are 95% confident that the mean gain for all SAT math second-try scores to be between 18.9 and 25.1 points. 90%

Warm Up A 2003 paper investigated the tendency of people to rationalize their poor performance. Subjects were initially given a test asking them to guess.

The Normal Distribution

MATH 2311 Section 7.5.

Chapter 5 Normal Probability Distributions.

First Semester Final Exam

Chapter 5 Normal Probability Distributions.

Warm Up Find the following: Mean ± 1 Std Deviation =

MATH 2311 Section 4.4.

Final Exam will be 24 Questions (22 at 4 points, 2 at 6 points)

MATH 2311 Section 7.4.

MATH 2311 Section 7.5.

Presentation transcript:

Warm Up A 2005 survey of 1000 randomly selected adults asked their most favorite and least favorite subjects in school. The most popular choice in both categories was math! 23% chose math as their favorite while 37% chose math as their least favorite. Construct a 90% confidence interval for the proportion of adults who feel math is their most favorite subject.

Practice Find t* using both Table B and the InvT command on your graphing calculator. 1) 90% confidence level and n = 15 2) 96% confidence level and n = 25 3) 99% confidence level and n = 45 4) 98% confidence level and n = 70

Example Imagine we took a sample of 30 randomly selected students here at Leland and measured the amount of time they spent on homework on a given night. The sample data is: Mean = 2.05 hours Std dev = 0.75 hours Construct a 95% confidence interval for the value of m, the mean time that all Leland students spend on homework.

Practice A 2014 survey conducted at Baylor University found that 164 randomly selected undergraduates spent an average of 528 minutes on their cell phones on a daily basis. The standard deviation was 163 minutes. Construct a 95% confidence interval for the value of m, the mean time undergraduate students at Baylor spend on their cell phones per day.

Practice The following data is the egg weight (in grams) for a random sample of 10 eggs taken from the same farm (Indian Journal of Poultry Science, 2009). If possible, use this data to construct a 90% confidence interval for the value of m, the mean weight of all eggs from the farm. 53.04 53.50 52.53 53.00 53.07 52.86 52.66 53.23 53.26 53.16