Week 1

Question 1

What are the things that exist in the center of a normal curve?

Answer 1

Mean, median and mode

Question 2

What does an inflection point on a normal curve mark?

Answer 2

A standard deviation from the mean

Question 3

The distributions of most continuous random variables will follow the shape of the ____

Answer 3

The distributions of most continuous random variables will follow the shape of the normal curve

Question 4

What does the empirical rule state?

Answer 4

• 68% of all values fall within 1 standard deviation of the mean
• 95% of all values fall within 2 standard deviation of the mean
• 99.7% of all values fall within 3 standard deviations of the mean

Question 5

What are the 3 major types of central tendency?

Answer 5

Mean, median, and mode

Question 6

____ refers to the measure used to determine the center of a distribution of data.

Answer 6

Central tendency refers to the measure used to determine the center of a distribution of data.

Question 7

What is central tendency used for?

Answer 7

It is used to find a single score that is most representative of an entire data set

Question 8

What is a data set with 2 modes called?

Answer 8

Bi-modal

Question 9

A data set with more than one mode can be described as ___

Answer 9

Multi-modal

Question 10

____is mostly used to represent the central tendency, but sometimes outliers can interfere with its usage

Answer 10

Mean is mostly used to represent the central tendency, but sometimes outliers can interfere with its usage

Question 11

What is an outlier?

Answer 11

A value that is very different from the other data in the data set

Question 12

What is a variable?

Answer 12

A property that can take on many values

Question 13

What are the two kind of variables?

Answer 13

Quantitative variables and qualitative/categorical variables

Question 14

What is a quantitative variable and what kind you do with it?

Answer 14

Variables measured numerically. With quantitative variables, can do things like add and subtract, multiply and divide, and get a meaningful result

Question 15

_____ allow for classification based on some characteristic

Answer 15

*Qualitative/ categorical variables allow for classification based on some characteristic

Question 16

What are the two types of quantitative variable?

Answer 16

Discrete variables and Continuous variables

Question 17

Whta is a discrete variable?

Answer 17

A quantitative variable with a finite number of values. Ex: the amount of even numbers on a dice

Question 18

What is a continuous variable?

Answer 18

A quantitative variable with an infinite number of values Ex: temp

Question 19

What is an independent variable?

Answer 19

Any variable that is being manipulated

Question 20

What is a dependent variable?

Answer 20

Any variable that is being measured

Question 21

What are the four data types of measured variables?

Answer 21

• Nominal
• Ordinal
• Interval
• Ratio

Question 22

_____ data (also known as qualitative/categorical data) is data that is split into categories (dichotomous)

Answer 22

Nominal data (also known as qualitative/categorical data) is data that is split into categories (dichotomous)

Question 23

____ data is data where order matters, but distance between values does not

Answer 23

Ordinal data is data where order matters, but distance between values does not

Question 24

____ data is where order matters, and distances between values are qual and meaningful, but there is no natural zero present

Answer 24

Interval data is where order matters, and distances between values are qual and meaningful, but there is no natural zero present

Question 25

____ data is data where order matters, distances between values are equal and meaningful, and a natural zero is present

Answer 25

Ratio data is data where order matters, distances between values are equal and meaningful, and a natural zero is present

Question 26

___ is best for numeric symmetrically distributed data

Answer 26

Mean is best for numeric symmetrically distributed data

Question 27

___ is best for numeric non-symmetrically distributed data

Answer 27

Median is best for numeric non-symmetrically distributed data

Question 28

What level of measurement is dichotomous?

Answer 28

Nominal

Question 29

Gender is a ___ level of measurement

Answer 29

Gender is a nominal level of measurement

Question 30

Time is a ___ level of measurement

Answer 30

Time is a ratio level of measurement

Question 31

Age is a ___ level of measurement

Answer 31

Age is a ratio level of measurement