Descriptive Statistics

The simplest form of a standard score is the T score.

• TRUE

• FALSE

A scatterplot is a pictorial representation of the relationship between two quantitative variables.

• TRUE

• FALSE

Statistics are indices obtained from AN ENTIRE POPULATION, while Parameters are indices obtained from a SAMPLE

• TRUE

• FALSE

Which of the above is the right definition for raw scores

• grouped scores in a test

• single units (# of repetitions or occurences)

• Perfomance comparison

• All of them

The median is a better index of central tendency than the mean when the distribution is

• Bimodal

• Skewed

• Normal

• Symmetrical

Categorical data differs in kind

• False

• True

Quantitative data differ in degree or amount

• True

• False

A crossbreak table is used for analyzing data obtained for

• Two quantitative variables

• Two caterogical variables

• One quantitative variable

• One categorical variable

Which one is the mean for the next example:

These are the scores students obtained in a History test, let us discover the average score of the class:

5,8,6,9,3,9,3,7,5,6.

• 6.0

• 5.5

• 7.2

• 6.1

Convert the z score to T score

z score = -1

formula: z score x 10 + 50

• 50

• 30

• 20

• 40