Populations, Samples, and Generalizing

Inferential Statistics consists of which of the following:

HINT: THERE ARE 3 CORRECT CHOICES.

• summarization of data

• determining relationships among variables

• performing estimations and hypothesis tests (evaluating claims about a population based on data from samples)

• generalizing from samples to populations

• presentation of data

Dividing a high school student population by grade level and randomly selecting 10 students from each grade level to get a 40 student sample represents:

HINT: 1 CORRECT CHOICE

• cluster sampling

• stratified sampling

• systematic sampling

• random sampling

Dividing a high school student population by grade level and randomly selecting a sample of 40 students from only the 10th grade represents:

HINT: 1 CORRECT CHOICE

• cluster sampling

• stratified sampling

• systematic sampling

• random sampling

A group of subjects selected from a population is a _________________.

• Portion

• Sample

• Group

• Data

What is the difference between a sample and a population?

A ​ (a)   is a set of all items or events which are of interest for some question or experiment.

It is generally the group you are trying to make predictions or learn something about.

For most studies, it is either impossible or impractical to obtain data on an entire population.

This is why you need to use a smaller selection of items.

A ​ (b)   is a selection of observations from a population.

We measure data in a known sample to make a prediction, or inference, about the population.

• population

• correlation

• sample

• causation

• ideation

• application

• understudy

• sample survey

• experiment

• observational study

Juna is interested in determining if all surfers in Florida own a long board. He surveys a random sample of 54 Florida surfers to determine if they own a long board. Match the answer to the question.

• Who is the sample?

• The 54 surfers

• Who is the population?

• All Florida surfers

• Will this pass the CLT?

• Yes, its random, the sample and population is large.

Match the following

• p

• Sample

• N

• Population

• n

• Population Size

• Parameter

• Sample Size

• Statistic

• Population Proportion

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• Stratified: separated by team

• Type of Sample

• All of Barton's sports t-shirts

• The Sample

• The t-shirts Barton collected

• The Population

_____________________ statistics consists of generalizing from samples to populations, performing estimations and hypothesis tests, determining relationships among variables, and making predictions.

• mathematical

• descriptive

• inferential

• population

10% of college students are predicted to travel out the country during spring break.

• Inferential

• Descriptive