Intro Statistics

For any given class, there is an 80% chance Mr. Brown remembers to share his screen. If he teaches 20 classes in a week find the probability that he remembers to share in at least 16 of them.

• 0.3704

• 0.5886

• 0.6296

• 0.4114

This deals with the collection, analysis, interpretation, and presentation of data.

• Algebra

• Calculus

• Statistics

• Trigonometry

Which of the following is considered descriptive statistics?Check all that apply.

• Organizing data

• Summarizing data

• Making statistical inference

Identify the population:

A survey of 500 adults in the U.S. found found that 54% drink daily coffee.

• A collection of the 500 adults surveyed

• Collection of all adults in the U.S.

• 54%

• 500

Identify the sample:

A survey of 500 adults in the U.S. found that 54% drink coffee daily.

• A collection of the 500 adults surveyed

• Collection of all adults in the U.S.

• 54%

• 500

A national survey asked 1261 U.S. adult fast-food customers which meal (breakfast, lunch, dinner, snack) they ordered. What is the variable?

• meal

• U.S. adult fast-food customers

• 1261 U.S. adult fast-food customers

• national survey

A national survey asked 1261 U.S. adult fast-food customers which meal (breakfast, lunch, dinner, snack) they ordered. Is the variable qualitative or quantitative?

• quantitative (discrete)

• qualitative (continuous)

• qualitative

You are conducting a survey of the people of the United States to find out how popular the contact sports are. You randomly choose people to call and make 1,000 phone calls to people scattered across the country. In this study, what is the statistics term for THE PEOPLE IN THE U.S., and what is the statistics term for THE PEOPLE YOU CALLED?

• Both the people of the U.S. and the people you called are POPULATIONS.

• The people of the U.S. are the POPULATION, and the people you called are the SAMPLE.

• The people of the U.S. are the SAMPLE, and the people you called are the POPULATION.

• Both the people of the U.S. and the people you called are SAMPLES.

Which of the following best describes a univariate data set?

• Data collected on the height and weight of individuals

• Data collected on the temperature of a city over a week

• Data collected on the favorite colors of students

• Data collected on the number of pets owned by families

Answer explanation

A univariate data set involves one variable. The temperature of a city over a week is a single variable measured over time, making it univariate. The other options involve multiple variables or categories.

What is the term for the proportion of a specific category relative to the total number of observations?

• Frequency

• Relative frequency

• Joint relative frequency

• Marginal relative frequency

Answer explanation

The term 'relative frequency' refers to the proportion of a specific category compared to the total number of observations. It provides insight into how often a category occurs within the overall dataset.