Quiz Review Day 1

Quiz Review Day 1

Lesson 1: Population vs. Sample
Lesson 2: Parameter or Statistic

In statistics, population is the entire set of items from which you draw data for a statistical study. It can be a group of individuals, a set of items, etc.


An example of a population would be the entire student body at a school.

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Population

A sample is defined as a smaller and more manageable representation of a larger group.

A sample is used in statistical testing when the population size is too large for all members or observations to be included in the test

​Sample

Multiple Choice

The student government committee at a high school surveys 100 of the students at the school to get their opinions about a change to the bell schedule. Identify the population.

• 100 students surveyed

• All students at the school

Multiple Choice

The student government committee at a high school surveys 100 of the students at the school to get their opinions about a change to the bell schedule. Identify the sample.

• 100 students surveyed

• All students at the school

Multiple Choice

The quality control manager at a bottling company selects a sample of 10 cans from the production line every hour to see if the volume of the soda is within acceptable limits. Identify the sample.

• All cans produced that hour

• 10 cans selected that hour

Multiple Choice

The quality control manager at a bottling company selects a sample of 10 cans from the production line every hour to see if the volume of the soda is within acceptable limits. Identify the population.

• All cans produced that hour

• 10 cans selected that hour

Multiple Choice

An archaeological dig turns up large numbers of pottery shards, broken stone implements, and other artifacts. Students working on the project classify each artifact and assign it a number. The counts in different categories are important for understanding the site, so the project director chooses 2% of the artifacts at random and checks the students' work. Identify the population.

• 2% of artifacts found at the site

• All artifacts found at the site

Multiple Choice

An archaeological dig turns up large numbers of pottery shards, broken stone implements, and other artifacts. Students working on the project classify each artifact and assign it a number. The counts in different categories are important for understanding the site, so the project director chooses 2% of the artifacts at random and checks the students' work. Identify the sample.

• 2% of artifacts found at the site

• All artifacts found at the site

Multiple Choice

Identify the following as a population or a sample:

50 cows from a dairy farm selected at random to be tested for E-Coli.

• Population

• Sample

Multiple Choice

Identify the following as a population or a sample:

50 cows from a dairy farm selected at random for E-Coli testing.

• Population

• Sample

Multiple Choice

Identify the following as a population or a sample:

All American women ages 18+ surveyed about if they feel safe going for a run in their neighborhood.

• Population

• Sample

Multiple Choice

Identify the following as a population or a sample:

Every 10th person that leaves the grocery store asked to rate the store's cleanliness on a scale from 1 (very dirty) to 10 (very clean)

• Population

• Sample

Multiple Choice

Identify the following as a population or a sample:

Every high school student in the West Haven surveyed about their opinion for a four-day school week.

• Population

• Sample

What is a Parameter?

A population parameter is a numerical value that describes a characteristic of a population.


For example: 75% of the school's population would prefer to have a four-day school week. The amount 75% is the parameter because it represents 75% of all the students in the school!

What is a Statistic?

A sample statistic, on the other hand, is a numerical value that describes a characteristic from a sample size.


For example: 50 people out of a random sample of 100 people said they prefer Coke over Pepsi. The 50 would be a statistic because that number came from a "random sample".

Multiple Choice

Identify the following as either a parameter or a statistic:

The average weight of all German Shepherd dogs.

• Parameter

• Statistic

Multiple Choice

Identify the following as either a parameter or a statistic:

55% of all U.S. households earn less than $100k a year.

• Parameter

• Statistic

Multiple Choice

Identify the following as either a parameter or a statistic:

17 out of the 50 patients surveyed said they did not feel any better after taking a certain medication for their condition.

• Parameter

• Statistic

Multiple Choice

Identify the following as either a parameter or a statistic:

61% of people who responded to a random survey conducted by Dunkin' Donuts said they would be willing to switch their regular coffee order to try something new.

• Parameter

• Statistic

Poll

How well do you understand the difference between a Population and a Sample?

• I'm going to ace this quiz!

• Got it!

• Still confused

• No clue

Poll

How well do you understand the difference between a Parameter and a Statistic?

• I'm going to ace this quiz!

• Got it!

• Still confused

• No clue