Statistics Vocabulary Population

A (a)   sample is a sample in which each member of the population is assigned a number. The members of the population are ordered in some way, a starting number is randomly selected, and then sample members are selected at regular intervals from the starting number. (For instance, every 3^rd , 5^th , or 100^th member is selected.)

(a)   data consist of numerical measurements or counts.

A (a)   sample is used when it is important to have members from each segment of the population. Depending on the study, members are divided up into 2 or more different subsets, called strata, that share a similar characteristic, such as age, gender, ethnicity, or even political preference. A sample is then randomly selected from each strata.

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

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

The following symbol represents what?

• the sample mean

• the population mean

• the sample standard deviation

• the population standard deviation

• the sample size

An entire data set can be summarized using one statistic. This statistic is most likely the _______.

• mode

• standard deviation

• range

• mean

The ____________ is equal to the standard deviation squared.

• standard deviation

• range

• variance

• maximum value

The middle value in a data set when the numbers are listed in order is referred to as the ________.

• mean

• median

• mode

• center

According to the picture, what is the standard deviation of the data set?

• 6.3

• 44

• 3.6

• 3.3