Intro. to Stats.
'Occupation' represents what kind of variable? (not what kind of scale)*
Discrete
This is an organized tabulation of the number of individuals located in each category in the scale of measurement.
Frequency Distribution
If I have a sample of 25 scores, how many degrees of freedom are present?
24
What is the equation for a z-score
(X-M)/SD
In Fahrenheit, at what temperature does water freeze?
32 degrees
What kind of scale consists of a set of categories that are organized in an ordered sequence?
Ordinal
I have 90 M&Ms in a jar, that are only of yellow, blue, and green. 21 are yellow and 37 are blue. What proportion of M&Ms are green?
.35555
What is the standard deviation for a population with a variance of 6?
2.45
Which of the following z-scores corresponds to the highest raw score?
a. 3.0
b. -1.0
c. 1.0
d. -3.0
A. 3
The Statue of Liberty was given to the US by which country?
France
What value describes a sample?
Statistic
If my mean is 3, my median is 3 and my mode is 3, is my data skewed?
No (Normal)
What does variability measure?
How spread out or clustered scores are
True or false: Does the normal curve have a skewness of zero?
True
What is the chemical symbol for iron?
Fe
What type of statistics allows us to study samples and generalize about the populations, which they represent?
Inferential
What is the mode(s) for this distribution of scores: 1, 3, 7, 3, 4, 5, 3, 5
3
If my SS=45 and my n=6, what is the sample SD?
3
A person has a z-score of +1.5. The sample has a mean of 7 and a standard deviation of 2. Convert this person’s z-score back into a raw score. What is it?
10
The Beaver is the national emblem of which country
Canada
What defines a 'ratio' scale (as compared to other scales)?
It has a true 0
Which measure of central tendency is MOST influenced by extreme scores?
Mean
What should deviation scores add up to (or near)?
0
What does a z-score measure?
How many SDs a score deviates from the mean
Which Tom Hanks movie won the Academy Award for Best Picture in 1994?
Forrest Gump