Week 5- intro to stats

Question 1

What are stages of theory development?

Answer 1

1- questions
2- claims
3- Evidence/data
4- evaluation

Question 2

What are measures of central tendency?

Answer 2

Describes the middle point of a data set

Question 3

What are measures of central tendency also known as?

Answer 3

Descriptive statistics

Question 4

what are measures of central tendency useful for?

Answer 4

Comparing differences across different groups and conditions

Question 5

What are the 3 types of central tendency?

Answer 5

• mean
• median
• mode

Question 6

What kind of data and forms of data can we do statistical tests on?

Answer 6

• continuous data
• interval and ratio data
  Sometimes ordinal

Question 7

What is the most commonly used measures of central tendency?

Answer 7

mean

Question 8

How do we calculate the mean?

Answer 8

Sum of all values and then divide by number of values in data set

Question 9

What is the median?

Answer 9

the middle numbers in the data set

Question 10

What is the mode?

Answer 10

The values that appear the most in a set of values

Question 11

What types of categorical data used measures of central tendency?

Answer 11

Ordinal data uses median and mode

Question 12

What types of continuous data uses measures of central tendency?

Answer 12

Interval and ratio data uses all types of MCT

Question 13

What are measures of dispersion?

Answer 13

The spread of data

Question 14

What do we use for measures of dispersion?

Answer 14

• The minima and maxima
• variance
• standard deviation

Question 15

What kind of data uses measures of dispersion?

Answer 15

continuous data

Question 16

What is the minima and maxima?

Answer 16

Lowest and highest values in a data set

Question 17

What are variance?

Answer 17

Amount of spread in a given data test

Question 18

How do we calculate the variance?

Answer 18

The sum of the difference squared/ number of participants -1

Question 19

What is the standard deviation?

Answer 19

It’s a measure of spread related to the mean

Question 20

How do you calculate the standard deviation?

Answer 20

1- sum of all the values in a data set 
2- square them 
3- square root it
4-Divide by the number of participants
5- minus 1