DATA MANAGEMENT

Question 1

a branch of mathematics that deals with data collection, organization, analysis, interpretation and presentation.

Answer 1

statistics

Question 2

defined as the procedure of collecting, measuring, and analyzing accurate insights for research using standard validated techniques

Answer 2

data collection

Question 3

refers to the method of classifying and organizing data sets to make them more useful, it can be applied to physical records or digital records.

Answer 3

data organization

Question 4

process of inspecting, cleansing, transforming, and modeling data with the goal of discovering useful information, informing conclusions, and supporting decision-making

Answer 4

data analysis

Question 5

process of assigning meaning to the collected information and determining the conclusions, significance, and implications of the findings.

Answer 5

interpretation of the data

Question 6

refers to the organization of data into tables, graphs or charts, so that logical and statistical conclusions can be derived from the collected measurements

Answer 6

presentation of the data

Question 7

two kinds of variables

Answer 7

qualitative
quantitative

Question 8

also called as categorical variables are variables that are not numerical. It describes data that fits into categories.

Answer 8

Qualitative variables

Question 9

are numerical. It can be ranked and has order

Answer 9

Quantitative variables

Question 10

no. of students present

Answer 10

Discrete

Question 11

no. of re marbles in a jar

Answer 11

Discrete

Question 12

no. of heads when flipping three coins

Answer 12

Discrete

Question 13

students’ grade level

Answer 13

Discrete

Question 14

height of students in class

Answer 14

continuous

Question 15

weight of students in class

Answer 15

continuous

Question 16

time it takes to get to school

Answer 16

continuous

Question 17

distance traveled between classes

Answer 17

continuous

Question 18

Types of statistical data

Answer 18

numerical
categorical

Question 19

These data have meaning as a measurement such as a person’s height, weight, IQ, or blood pressure or shares of stocks a person owns.

Answer 19

Numerical Data

Question 20

represent characteristics such as a person’s gender, marital status, hometown, or the types of motives they like.

Answer 20

Categorical Data

Question 21

This can take on numerical values (such as 1 indicating male and
2 indicating female) but those numbers don’t have mathematical meaning.

Answer 21

Categorical Data

Question 22

Four level of measurements

Answer 22

Nominal
ordinal
interval
ratio

Question 23

the lowest of the four ways to characterize the data. it deals with names, categories, or labels.

Answer 23

Nominal

Question 24

the data at this level can be ordered but no differences between the data

Answer 24

ordinal

Question 25

deals with data that can be ordered, and in which differences between the data does make sense. But data at this level has no starting point.

Answer 25

interval

Question 26

the highest level of measurement. data possess all the features of the interval level, in addition to an absolute zero. due to the presence of a zero, it now makes sense to compare the ratios of the measurements

Answer 26

ratio

Question 27

Methods of collecting data

Answer 27

in-person interviews mail surveys phone surveys web/online surveys

Question 28

Pros: in depth and a high degree of confidence on the data

Answer 28

in-person interviews

Question 29

Cons: Time consuming, expensive and can be dismissed as anecdotal

Answer 29

in-person interviews

Question 30

Pros: Can reach anyone and everyone -- no barrier

Answer 30

Mail surveys

Question 31

Cons: Expensive, cannot self-administer, need to hire an agency

Answer 31

Phone survey

Question 32

Cons: Expensive, data collection errors, lag time

Answer 32

Mail surveys

Question 33

Pros: High degree of confidence on the data collected, reach almost everyone

Answer 33

Phone survey

Question 34

Pros: Cheap. can self-administer, very low probability of data errors

Answer 34

Web/Online survey

Question 35

Cons: Not all your customer might have an email address/be on the internet, customers may be worry of divulging information online

Answer 35

Web/Online survey

Question 36

Three ways of presenting data

Answer 36

textual tabular graphical

Question 37

this method comprises data presentation with the help of a paragraph or a number of paragraphs

Answer 37

textual

Question 38

the method of presenting data using statistical table. a systematic organization of data in columns and rows

Answer 38

tabular

Question 39

a chart representing the quantitative variations or changes of variables in pictorial or diagrammatic form

Answer 39

graphical

Question 40

the rate that measures how often something occurs

Answer 40

frequency

Question 41

a pictorial representation of statistical data in such a way that length of the rectangles in the graph represents the proportional value of the variable. _______ are generally used to compare the values of several variables at a time to analyze that data. The length of the bars represents the frequency of the variable and is applicable to discrete categories only.

Answer 41

Bar Graph

Question 42

a graphical display of information that changed continuously over time. Within a line graph, there are points connecting the data to show a continuous change. The lines in a line graph can descend and ascend based on the data. We can also compare different events, situations, and information.

Answer 42

Line graph or line chart

Question 43

type of a graph that displays data in a circular graph. the pieces of the graph are proportional to the fraction of the whole in each category. each slice of the pie is relative to the size of that category in the group as a whole. the entire pie represents 100 percent of a whole, while the pie slices represent portions of the whole

Answer 43

pie chart