Investigating Data and Statistical Reasoning

A continuous random variable is a random

variable that:

• can assume an infinite number of values

  between adjacent units on a scale.

• has a finite number of possible outcomes

  that can be listed.

• for which no values are possible between

  adjacent units on the scale.

• that can assume a fixed number of values

  between adjacent units on a scale.

The steps of statistical investigation include

all the following EXCEPT:

• Collection

• Organization

• Dictation

• Interpretation

Inferential statistics is concerned with:

• giving the best estimate of the

  population.

• finding the measures of central

  tendencies.

• making conclusions about a population

  from sample data.

• summarizing and presenting data.

Which of the following is the most

appropriate example of a discrete random

variable?

• Distance

• Height

• Age

• Weight

All of the following are advantages of using

questionnaires to collect data EXCEPT:

• quick turnaround time.

• can be administered to groups.

• ease of data analysis for closed-ended

  items.

• allows probing and follow up-questions.

Which of the following is a qualitative

variable?

• The colours of birds in a cage.

• The weight of students in your class.

• The scores of your classmates on a

  Statistics Test.

• The height of first year students at your

  college.

In a set of observations, the measure of

central tendency that reports the value that

occurs MOST frequently is called the:

• mean

• median

• mode

• range

The scores attained by a group of Statistics

students on a test are 66, 54, 72, 81, 60, 54.

What is the median score?

• 81

• 72

• 63

• 54

Determine the mean of the numbers

24, 19, 11, 0, 17, 19

• 15

• 18

• 19

• 24

Determine the range of the values

36, 18, 16, 18, 43, 20

• 16

• 18

• 27

• 43