Statistics Test 4

Question 1

What is the independent effect?

Answer 1

it is when the original relationship is not affected by a second independent variable

Question 2

What is the explanation effect?

Answer 2

It is when the original relationship is spurious the second independent variable cause y

Question 3

Determinism:

Answer 3

absence of randomness outcomes are caused by something

Question 4

Rule of P

Answer 4

to be significant or reject Ho p must be less than .05

to be not significant or accept Ho p must be greater or equal to .05

Question 5

When you use correlation coefficient attach:

Answer 5

scattergram

Question 6

Locate outliers,

Answer 6

raise the question and speculate

Question 7

Define type 1 error:

Answer 7

to reject the null hypothesis when its true

Question 8

Define type 2 error:

Answer 8

to accept the null hypothesis when its false

Question 9

The greater the dimension,

Answer 9

the higher the code

Question 10

In a scattergram what goes on a horizontal line is the,

Answer 10

independent variable

Question 11

In a scattergram what goes on a vertical line is the,

Answer 11

dependent variable

Question 12

When you are a manager:

Answer 12

never trust a biserial/biveriate relationship; truism

Question 13

The best predictor of the future(y) is the:

Answer 13

past(x). The past is the single best predictor

Question 14

Why does scatter matter?

Answer 14

bc management aim of correlation is to predict (y)

Question 15

The relationship between scatter and prediction:

Answer 15

the more the scatter the less the prediction

the less the scatter the better the prediction

Question 16

What is correlation coefficient?

Answer 16

it is one number that summarizes a scattergram

Question 17

You interpret the direction by the _______ and you interpret the strength by the _______.

Answer 17

Sign & scatter

Question 18

What do you miss in a correlation coefficient?

Answer 18

outliers

Question 19

Correlation coefficient is an inferential tool?

Answer 19

False

Question 20

William S. Gasset:

Answer 20

Created student T

Question 21

If alpha equals .05 in a sample of N=10 in a two tail test, t is

Answer 21

+ or - 2.306

Question 22

Biveriate analysis,

Answer 22

one independent variable, one dependent variable. The independent variable in the caption, and the dependent variable in the stub

Question 23

Multivariate analysis,

Answer 23

Two independent variable, one dependent variables. The two independent variable are in the caption

Question 24

Beta:

Answer 24

measures the relationship between X and Y

Question 25

Singular linear regression:

Answer 25

y = a + b(x)

x is the independent variable
y is the dependent variable
b is the beta

Question 26

Multiple linear regression:

Answer 26

y = a + b(x) + b(x)

Question 27

It is important for managers:

Answer 27

to raise the question

Question 28

alpha synonyms

Answer 28

level f signifcance
lower case p
sig