Active Learning Lecture Slides For use with Classroom Response Systems Statistics: The Art and...

Active Learning Lecture Slides For use with Classroom Response Systems

Statistics: The Art and Science of Learning

from Data

1.1 A social scientist is interested in studying the drinking habits of college students. She randomly picks 1,000 students from the college directory using an automated computer system. What aspect of statistics has she just completed?

a) Designb) Descriptionc) Inference

1.1 A social scientist is interested in studying the drinking habits of college students. She randomly picks 1,000 students from the college directory using an automated computer system. What aspect of statistics has she just completed?

1.2 A social scientist is interested in studying the drinking habits of college students. She asks each student how many drinks they had last Saturday night. She finds the average for 1,000 randomly selected students and creates a graph to display the results. What aspect of statistics is described in bold type?

1.3 A social scientist is interested in studying the drinking habits of college students. She asks 1,000 students how many drinks they had last Saturday night. From this survey, she is able to conclude that the average amount of alcoholic beverages consumed by all students in the university last Saturday night was most likely between 0.3 and 2.3 drinks. What aspect of statistics is described in bold type?

1.4 The General Social Survey (GSS) asks questions to a sample of Americans to determine their opinions about a wide range of topics every other year. In 2006 the GSS survey found that 67% of those sampled were in favor of the death penalty for those convicted of murder. What aspect of statistics is this?

1.5 The General Social Survey asks questions to a sample of Americans to determine their opinions about a wide range of topics every other year. Using data from the 2006 survey and statistical methods it can be deduced that the percentage of all Americans that favor the death penalty for those convicted of murder is most likely between 65.19% and 68.70%. What aspect of statistics is this?

1.6 A social scientist is interested in studying the drinking habits of college students. She randomly picks 1,000 students from the University of Florida phone directory using an automated computer system. What is the population?

a) The 1,000 students sampledb) All students at the University of Floridac) All students in universities across the U.S.

1.6 A social scientist is interested in studying the drinking habits of college students. She randomly picks 1,000 students from the University of Florida phone directory using an automated computer system. What is the population?

a) The 1,000 students sampledb) All students at the University of Floridac) All students in universities across the U.S.

1.7 The General Social Survey (GSS) asks questions to a sample of Americans to determine their opinions about a wide range of topics every other year. In 2006 the GSS survey asked 2,815 participants if they were in favor or opposed to the death penalty for those convicted of murder. What is the sample?

a) The 2,815 participantsb) All adults in the United Statesc) All adults in the world

1.7 The General Social Survey (GSS) asks questions to a sample of Americans to determine their opinions about a wide range of topics every other year. In 2006 the GSS survey asked 2,815 participants if they were in favor or opposed to the death penalty for those convicted of murder. What is the sample?

a) The 2,815 participantsb) All adults in the United Statesc) All adults in the world

1.8 In 2006 the GSS survey asked 2,815 participants if they were in favor or opposed to the death penalty for those convicted of murder and 67% of those surveyed stated that they were in favor of the death penalty. What is the parameter and the statistic?

a) Parameter = 67% Statistic = 67%b) Parameter = 67% Statistic = unknownc) Parameter = unknown Statistic = 67%d) Parameter = unknown Statistic = unknown

1.8 In 2006 the GSS survey asked 2,815 participants if they were in favor or opposed to the death penalty for those convicted of murder and 67% of those surveyed stated that they were in favor of the death penalty. What is the parameter and the statistic?

a) Parameter = 67% Statistic = 67%b) Parameter = 67% Statistic = unknownc) Parameter = unknown Statistic = 67%d) Parameter = unknown Statistic = unknown

1.9 Suppose that two researchers both randomly sampled 400 different students at the University of Miami and asked the students if they consumed any alcoholic beverages in the past week. From their sample, the researchers each computed the proportion of students that consumed an alcoholic beverage in the past week. Are the two proportions from the two samples the same?

a) Yes, both researchers drew from the same population.b) Probably not, samples vary.

1.9 Suppose that two researchers both randomly sampled 400 different students at the University of Miami and asked the students if they consumed any alcoholic beverages in the past week. From their sample, the researchers each computed the proportion of students that consumed an alcoholic beverage in the past week. Are the two proportions from the two samples the same?

a) Yes, both researchers drew from the same population.b) Probably not, samples vary.

1.10 Scientists are interested in the health of yellow fin snapper in the Bahamas. In the Bahamas, twenty yellow fin snapper are captured, weighed, have a blood sample taken and then are released. The average weight of the 20 snappers was 2.5 pounds. What is the population?

a) Twenty yellow fin snapperb) All yellow fin snapper in the Bahamasc) All yellow fin snapper in the worldd) 2.5 poundse) Unknown

1.10 Scientists are interested in the health of yellow fin snapper in the Bahamas. In the Bahamas, twenty yellow fin snapper are captured, weighed, have a blood sample taken and then are released. The average weight of the 20 snappers was 2.5 pounds. What is the population?

a) Twenty yellow fin snapperb) All yellow fin snapper in the Bahamasc) All yellow fin snapper in the worldd) 2.5 poundse) Unknown

1.11 True or False: If a data set is listed on the internet it can be trusted.

a) True, if it is posted on the internet it must be a source of reliable data.b) False, not all data on the internet is reliable, check the source of the data.

1.11 True or False: If a data set is listed on the internet it can be trusted.

a) True, if it is posted on the internet it must be a source of reliable data.b) False, not all data on the internet is reliable, check the source of the data.

1.12 True or False: If a statistic is listed in the newspaper it can be trusted completely.

a) True, newspapers only print reliable information. b) False, not all data in the newspaper comes from reliable studies.

1.12 True or False: If a statistic is listed in the newspaper it can be trusted completely.

a) True, newspapers only print reliable information. b) False, not all data in the newspaper comes from reliable studies.

1.13 True or False: The opinion polls that can be completed on news websites such as cnn.com are good ways to determine the American public’s opinions about popular topics.

a) True, it is a well respected news site so the results of its surveys can be trusted. b) False, the people who complete these surveys do not constitute a representative sample of Americans.

1.13 True or False: The opinion polls that can be completed on news websites such as cnn.com are good ways to determine the American public’s opinions about popular topics.

a) True, it is a well respected news site so the results of its surveys can be trusted. b) False, the people who complete these surveys do not constitute a representative sample of Americans.

1.14 What is the correct format of a data file?

a) Each row represents a subject in the study and each column represents a characteristic about that subject. b) Each row represents a characteristic about a subject and each column represents a subject.

1.14 What is the correct format of a data file?

a) Each row represents a subject in the study and each column represents a characteristic about that subject. b) Each row represents a characteristic about a subject and each column represents a subject.

1.15 Suppose that you took a sample of three people and asked them how much they spent on lunch and whether they had avegetarian lunch or not. Which of the following is the correct way to create a data file?

a) Jane Jo Juan 10 8 8 y n n

Jane Jo Juan

10 8 8

Name Amount Spent

on Lunch

Vegetarian or

Jane 10 y

Jo 8 n

Juan 8 n

1.15 Suppose that you took a sample of three people and asked them how much they spent on lunch and whether they had a vegetarian lunch or not. Which of the following is the correct way to create a data file?