Chapter 1, The Nature of Probability and Statistics Video Solutions, Elementary Statistics a Step by Step Approach

02:52

Problem 1

Define statistics.

Brian Lin

Numerade Educator

01:24

Problem 2

What is a variable?

Brian Lin

Numerade Educator

01:40

Problem 3

What is meant by a census?

Brian Lin

Numerade Educator

02:09

Problem 4

How does a population differ from a sample?

Brian Lin

Numerade Educator

01:42

Problem 5

Explain the difference between descriptive and inferential statistics.

Sanchit Jain

Numerade Educator

06:48

Problem 6

Name three areas where probability is used.

Vishal Sharma

Numerade Educator

01:40

Problem 7

Why is information obtained from samples used more often than information obtained from populations?

Brian Lin

Numerade Educator

01:24

Problem 8

What is meant by a biased sample?

Brian Lin

Numerade Educator

01:21

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
Because of the current economy, $49 \%$ of 18 - to 34 - year - olds have taken a job to pay the bills. (Source: Pew Research Center)

Brian Lin

Numerade Educator

00:47

Problem 10

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
In $2025,$ the world population is predicted to be 8 billion people. (Source: United Nations)

Brian Lin

Numerade Educator

01:50

Problem 11

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
In a weight loss study using teenagers at Boston University, $52 \%$ of the group said that they lost weight and kept it off by counting calories.

Brian Lin

Numerade Educator

01:29

Problem 12

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
Based on a sample of 2739 respondents, it is estimated that pet owners spent a total of 14 billion dollars on veterinarian care for their pets. (Source: American Pet Products Association, Pet Owners Survey)

Brian Lin

Numerade Educator

01:36

Problem 13

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
A recent article stated that over 38 million U.S. adults binge-drink alcohol.

Brian Lin

Numerade Educator

01:10

Problem 14

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
The Centers for Disease Control and Prevention estimated that for a specific school year, $7 \%$ of children in kindergartens in the state of Oregon had nonmedical waivers for vaccinations.

Brian Lin

Numerade Educator

02:14

Problem 15

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
A study conducted by a research network found that people with fewer than 12 years of education had lower life expectancies than those with more years of education.

Brian Lin

Numerade Educator

01:38

Problem 16

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
A survey of 1507 smartphone users showed that $38 \%$ of them purchased insurance at the same time as they purchased their phones.

Brian Lin

Numerade Educator

01:48

Problem 17

For Exercises 9–17, determine whether descriptive or inferential statistics were used.
Forty-four percent of the people in the United States have type O blood. (Source: American Red Cross)

Brian Lin

Numerade Educator

04:42