Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Soc Stat Ex 1 > Ex 1 > Flashcards

Ex 1 Flashcards

1
Q

Mutually Exclusive variable

A

A type of variable that permits each case to be counted in one and only one category

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Exhaustive Variable

A

Meaning a category is provided for each possible category

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Independent Variable

A

A variable that is identified as a casual variable. Thought to cause the dependent variable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Dependent Variable

A

The variable that is effected, resultant, or the outcoem. It is caused by the independent variable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Three Levels of Measurement

A

Represented by nominal, ordinal, and interval-ratio variables

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Nominal Variable

A

Variables at this level have categoies that are not numerical. They incldue gender, zip code, race, religion. Lowest level of measurement. Only comparison permited is that of category size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Ordinal Variable

A
  • More sophisticated than nominal
  • Scores or categories that can be ranked from high to low
  • We can say cases are higher or lower
  • upper, middle, working, lower
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Interval Ratio Variable

A

These variables provide distances between ranks, quantitative.

  • Measured in units that have equal intervals.
  • Have true zero point
  • Age, number of children, income
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Descriptive Statistics

A

Statistic techniques to organize and describe data from sample/ population

  • Measure of central tendency
  • measure of tendency
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Inferential Statistics

A

Make predictions based upon data from sample

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Poppulation

A

The total colelction of all cases in which the researcher is interested and wishes to understand better
-All possible cases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Sample

A

A carefully chosen subset of a population. In inferential stats, information is gathered from a sample and then generalized to a population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Sample statistics

A

What we find in a sample

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Cumulative frequency

A

In frequency distribution that displays the number of cases within an interval and all preceding intervals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Cumulative percentage

A

In frequency distribution displays percentage of cases within an interval and all preceding intervals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Frequnecy distribution

A

A table that displays the number of cases in each category of a variable

17
Q

Rate

A

The number of actual occurances of some phenomenon or trait divided by the number of possible occurrence per some unit of time

  • Cases / time
18
Q

Pie chart

A

Usually used to display percentage of cases in each category of a variable
- For nominal or ordinal variables

19
Q

Bar chart

A

A graphic display device for nominal or ordinal variables with few categories.

20
Q

Histogram

A

A graphic display device for interval ratio variables. Classes are represented by contiguous bars of equal width
-borders of bars touch

21
Q

mean

A

The arithmetic average of the scores

- bar over x

22
Q

Median

A

The point in a distribution of scores above and below which half of the cases fall
- Exact middle point

23
Q

Mode

A

The most common value in distribution or largest category

- Most common

24
Q

Standard Deviation

A
  • Average distance from the mean
  • interval ratio
  • it tries to estimate the amount of diversity in certain things that are interval ratio in nature such as income, age, education in years
25
Q

Variance

A

The amount of difference

- Average of squared deviation from mean

26
Q

Range

A

The highest score minus the lowest score

27
Q

interquartile range

A

The distance between the upper and lower quartiles

= Q3 - Q1

28
Q

IQV

A

Index of Qualitative Variation

  • its a measure of variation for categorical variables
  • A way to measure the variability of nominal variables
  • It is the total differenes divided by the total number of possible differences
  • It is always between zero and one
  • 0 == lack of variation
  • 1 == complete variation
  • We use single number to tell how much variation observed
  • Fails to take into consideration all points because it only looks at the squared percentages
29
Q

Z Scores

A

Number of standard deviation that a given raw score is above or below the mean
-Z == below mean
Z+ == above mean

30
Q

Standard Normal Distribution

A

A normal distribution represented in standard z scores

31
Q

Inferential Statistics - big picture

A

Prediction about population from observations from a sample

- Probablilty technique provides best opp for representable sample of pop

Soc Stat Ex 1 (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions