active learning lecture slides - montgomery college

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) Design

b) Description

c) Inference

picks 1,000 students from the college directory

using an automated computer system. What

aspect of statistics has she just completed?

a) Design

b) Description

c) Inference

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?

a) Design

b) Description

c) Inference

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

a) Design

b) Description

c) Inference

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

a) Design

b) Description

c) Inference

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

a) Design

b) Description

c) Inference

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?

a) Design

b) Description

c) Inference

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?

a) Design

b) Description

c) Inference

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?

a) Design

b) Description

c) Inference

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?

a) Design

b) Description

c) Inference

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 sampled

b) All students at the University of Florida

c) All students in universities across the U.S.

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 sampled

b) All students at the University of Florida

c) All students in universities across the U.S.

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 participants

b) All adults in the United States

c) All adults in the world

other year. In 2006 the GSS survey asked 2,815

death penalty for those convicted of murder. What

is the sample?

a) The 2,815 participants

b) All adults in the United States

c) All adults in the world

1.8 In 2006 the GSS survey asked 2,815

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 = unknown

c) Parameter = unknown Statistic = 67%

d) Parameter = unknown Statistic = unknown

1.8 In 2006 the GSS survey asked 2,815

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 = unknown

c) 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 snapper

b) All yellow fin snapper in the Bahamas

c) All yellow fin snapper in the world

d) 2.5 pounds

e) 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 snapper

b) All yellow fin snapper in the Bahamas

c) All yellow fin snapper in the world

d) 2.5 pounds

e) 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 a

vegetarian 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?

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

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