Descriptive Research

Question 1

when is the median more helpful than the mean?

Answer 1

When outliers are present or wth a skewed distribution

Question 2

what is a box plot good for?

Answer 2

large data

Question 3

Which values are most helpful when comparing: ratio data?

Answer 3

median and mean

Question 4

What is the value that occurs at the 2nd quarter mark of a percentile?

Answer 4

median

Question 5

what are examples of descriptive statistics?

Answer 5

mean, median, mode, standard deviation, frequency, percentage and variance

Question 6

What does historical research provide us?

Answer 6

a critical review of events, documents, literature, and other sources of data to reconstruct the past.

Question 7

Is the range helpful if there are outliers present?

Answer 7

No

Question 8

When is the coefficient of variation particularly helpful?

Answer 8

when comparing variation of 2 variables measured in different units.

Question 9

What is the order of the central tendencies if the data is R skewed?

Answer 9

Mode < Median < mean

Question 10

Why are measures of variability important?

Answer 10

• Helps determine the degree of variation within a population or sample
• can aid in determining how representative a particular score is of a data set.

Question 11

What is the order of the central tendencies if the data is L skewed?

Answer 11

Mean < Median < mode

Question 12

when is the standard deviation helpful?

Answer 12

helps to distinguish statistically significant data points from random fluctuations.

Question 13

what is the downside of a case study?

Answer 13

Cannot generate a conclusion from it

Question 14

what are the cons of a histogram?

Answer 14

does not show individual data points

Question 15

What is the coefficient of variation?

Answer 15

it is a unitless measure that depicts the size of the SD relative to the mean

Question 16

A stem and leaf plot is an example of:

Answer 16

a frequency distribution

Question 17

Name the 2 major statistical outputs of categorical data.

Answer 17

Frequency and percentage

Question 18

A right-skewed histogram is:

Answer 18

positively skewed

Question 19

Why are frequency distributions important?

Answer 19

They allow researchers a glance at the entire data conveniently.

Question 20

What is the mean?

Answer 20

the sum of all values divided by the total number of values

Question 21

what are examples of levels of measurements?

Answer 21

age, test score, speed, gender, disease status

Question 22

What is helpful when there are outliers present?

Answer 22

Percentiles

Question 23

what is a case study report?

Answer 23

they help with describing interesting, new and unique cases

Question 24

what are the postives of a stem and leaf plot?

Answer 24

shows individual data points

Question 25

When is the coefficient of variation particularly helpful?

Answer 25

when comparing variation of 2 variables measured in different units.

Question 26

What are the 5 measures of variability we are responsible for knowing?

Answer 26

percentiles range interquartile range standard deviation coefficient of variation

Question 27

why is a box plot bad?

Answer 27

It is simplistic & don't get to see all data

Question 28

A bimodal histogram is representative of:

Answer 28

2 populations present

Question 29

What are the uses of descriptive Research?

Answer 29

To define subject characteristics to measure data trends validate existing conditions

Question 30

What are the cons of a Stem and Leaf plot?

Answer 30

Plot can get overwhelming fast

Question 31

what are the disadvantages of descriptive research?

Answer 31

easy to bias limited scope

Question 32

What is the most common value used for measuring central tendency?

Answer 32

MEAN

Question 33

Which values are most helpful when comparing: ordinal data?

Answer 33

mode and median

Question 34

What are the benefits of historical research?

Answer 34

allows us the ability to understand why past events occurred analysis of how present conditions can influence current practice helps anticipate future events

Question 35

What is the median

Answer 35

the value of middle of ranked data

Question 36

What does a descriptive survey provide?

Answer 36

aims to provide an overall picture of group characteristics through the use of surveys.

Question 37

What are the 5 data points of a box plot?

Answer 37

minimum Q1 Q2 - median Q3 maximum

Question 38

What type of frequencies can be used on a continuous frequency distribution table?

Answer 38

raw, relative, cumulative

Question 39

what are examples of interferential statistics?

Answer 39

t - test, ANOVA, chi - square, fisher tests, effect size

Question 40

what does normative data look at?

Answer 40

aims to describe typical or standard values for characteristics of a given population

Question 41

What are the 2 major frequency distribution methods used for categorical data?

Answer 41

pie chart and bar graph

Question 42

how is normative research expressed typically?

Answer 42

as mean within range of acceptable values.

Question 43

When is the mean less helpful

Answer 43

when there are outliers present

Question 44

A histogram is an example of:

Answer 44

a frequency distribution

Question 45

descriptive statistics are:

Answer 45

statistics and data used to describe data.

Question 46

What is a variable?

Answer 46

Any characteristic that can and does assume different values for the different people, objects, or events being studied.

Question 47

What is the goal of statistics?

Answer 47

- provide a better understanding of the data collected and objectively solve our research problem. - allows sets of data to be compared to gain meaningful analysis of trends and results - provides a common language for researchers.

Question 48

A left-skewed histogram is:

Answer 48

negatively skewed

Question 49

inferential statistics are:

Answer 49

used to make a decision in order to answer a study question.

Question 50

what are the data collection methods?

Answer 50

interviews questionnaires direct observation databases

Question 51

A right-skewed histogram is:

Answer 51

positively skewed

Question 52

Which values are most helpful when comparing: interval data?

Answer 52

median and mean

Question 53

what are the pros of a histogram?

Answer 53

visually and easily show center of data handles data of all sizes

Question 54

What is the mode?

Answer 54

value that occurs most often

Question 55

What shape is a normal distribution curve of a histogram?

Answer 55

bell-shaped curve (symmetrical around the mean)

Question 56

Which values are most helpful when comparing: nominal data?

Answer 56

mode

Question 57

what are the benefits of case studies?

Answer 57

They help understand unusual patient conditions highlights innovative interventions generates and tests theories provides crucial foundation for future clinical research

Question 58

What type of frequencies can be used on a categorical frequency distribution table?

Answer 58

relative and raw (sometimes cumulative)

Question 59

What does developmental research look at?

Answer 59

involves different descriptions of developmental change and sequencing of behaviors in people over time.

Question 60

What are frequency distributions?

Answer 60

representations of the # of individuals in each category on the measurement scale.

Question 61

What are measures of central tendency?

Answer 61

Summary measure that attempts to describe a whole set of data with a single value that represents the middle or center of it's distribution.

Question 62

What is the standard deviation?

Answer 62

average absolute distance of each point from the mean

Question 63

Which measure of central tendency is used the least?

Answer 63

mode

Question 64

what are the characteristics of descriptive research?

Answer 64

-provides foundation of future research -prospective or retrospective data collection, longitudinal or cross-sectional methods -no control of variables quantitative or qualitative

Question 65

Levels of measurements is:

Answer 65

data in it's raw form