Examen 1 Estadistica

Question 1

Statistics

Answer 1

the science of gathering, presenting, analyzing, and interpreting data.​

Question 2

Branches of Statistics

Answer 2

Descriptive, Inferential

Question 3

Descriptive statistics

Answer 3

Graphical or numerical summaries of data

Question 4

Inferential statistics

Answer 4

Making a decision based on data

Question 5

Population

Answer 5

The whole - A collection of all persons, objects, or items under study

Question 6

Census

Answer 6

Gathering data from the entire population

Question 7

Sample

Answer 7

Gathering data on a subset of the population

Question 8

You use information about the ____________ to infer about the population

Answer 8

sample

Question 9

Used to describe a whole population

Answer 9

Parameter

Question 10

Mean (Media)

Answer 10

Es el promedio, es todo entre el total.

Question 11

Population Variance

Answer 11

Medida que indica cuan dispersos estan los datos en un conjunto completo, monstrando cuan lejos estan los valores del promedio.

Question 12

Media de muestra

Answer 12

Promedio de un conjunto de datos que representan una muestra

Question 13

Varianza de muestrs

Answer 13

Indica cuan dispersos estan los datos en una muestra especifica

Question 14

Desviacion estandar de muesta

Answer 14

Medida que dice cuanto se separan los datos en una muestra

Question 15

Medida descriptiva de una muestra

Answer 15

Estadistica

Question 16

Characteristic of any entity being studied that is capabale of taking on different values

Answer 16

variable

Question 17

When a standard process is used to assign numbers to particular attributes of the variable

Answer 17

Measurement

Question 18

Recorded measurements

Answer 18

Data

Question 19

Levels of Data Measurement in order from highest to lowest

Answer 19

Ratio, Interval, Ordinal and Nominal

Question 20

Name numeric levels of data measurement

Answer 20

Ratio and Interval

Question 21

Name categoric levels of data measurement

Answer 21

Ordinal and nominal

Question 22

Which level of data measurement is used solely to classify or categorize? Name examples

Answer 22

Nominal ; Examples could be profession, sex, eye color

Question 23

Which level of data measurents is used to rank or oder? Name examples.

Answer 23

Ordinal; Some examples could be ranking mutual funds by risk, 50 most admired companies.

Question 24

_______________ and __________ data are ______________ data because their measurements are imprecise

Answer 24

Nominal, ordinal, nonmetric or qualitative

Question 25

Level of data measurement where the distances between consecutive numbers in numerical datra hace meaning

Answer 25

Interval, like the farenheit temperature scale

Question 26

The zero point in intervals is _________________

Answer 26

A matter of convenience or convention, it does not mean a hard no

Question 27

Level of data measurement where the distances between consecutive numbers have meranings and the zero value represents the total abseence of the characteristic being stdied

Answer 27

Ratio, some ecamples are volume, weight, kelvin temperature.

Question 28

_________________ and ________ data are called ______________

Answer 28

Interval, ratio, metric or quantitative

Question 29

Parametric statistics

Answer 29

Require interval or ratio because they work better with data with defined intervals to meaure the intervals between values

Question 30

Is usedwith any type of data but mostly nominal and ordinal data equire these methods since its a moreflexible type of measurement.

Answer 30

Nonparametric statistics

Question 31

Why should you take a census?

Answer 31

Elimina la posibilidad de muestras aleatorias que no representen la poblacion, por seguridad y recogido de data.

Question 32

List, map, or directory used in the sampling process

Answer 32

Frame

Question 33

Contains units that are not in the target population

Answer 33

Overregistered

Question 34

Does not include some units that are in the population

Answer 34

Underregistered

Question 35

Every unit of the population has the same chnce of being selected

Answer 35

Random Sampling

Question 36

Generally not an appropriate technique for gathering data for statistical analysis

Answer 36

Nonrandom Sampling

Question 37

Population is divided into nonoverlapping subpopulations

Answer 37

Strata

Question 38

Survey subjects are selected based on referral from other survey respondents

Answer 38

Snowball

Question 39

Population subclasses, such as age or gender, are used as strata

Answer 39

Quota