Chapter 4 (PSYC 10)

The standard deviation of a population is symbolized by __.

(0) Weird Looking 0

When calculating variance, the mean of the deviations is always equal to _____.

0

Variance is 1600, what is the Standard Deviation?

40

The mean can be considered the _____ of the distribution.

Balancing Point

It is easy to spot the mode on a frequency distribution, as the most frequently occurring score is always the _____ of the distribution.

Highest Point

Obtaining a measure of intelligence from a group of college students would likely yield a normal distribution. What would be the BEST measure of central tendency to use in this example?

Mean

Outliers have the greatest effect on the ________.

Mean

If our data are nominal, we should use the _______ as a measure of Central Tendency.

Mode

It is possible that a distribution of scores could have more than one ______.

Mode

The simplest (and LEAST useful) measure of variability is the ________.

Range

N = 10, q = 47.7, SS = 2000. What is the standard deviation for this example?

Square Root of 200/10 = 14.14

_________ is the square root of the average of the squared deviations from the mean.

Standard Deviation

Numbers based on samples are referred to as _____, while numbers based on populations are referred to as ______.

Statistics; Parameters

The symbol SS stands for:

Sum of Squrared Deviations

A Deviation is ______.

The amount that a score in a sample deviates from the mean.

While computing variance and standard deviation, we are interested in how much individual scores vary from ______.

The mean.

IF you calculate the standard deviation of a distribution of scores and obtain a value as 0, which of the following statements is TRUE?

There is no variability in the distribition, all the scores are the same.

The number of forest fire fatalities in California for the last ten season was reported as 3, 8 ,3 ,7 ,7, 2, 8, 6, 2, and 3. What type of distribution is this?

Unimodal (3 is the only one appearing the most)