Chapter 9

Question 1

What is z score

Answer 1

A standardized score that indicates the location of a score within the population distribution

Question 2

What is a standardized score

Answer 2

Z score

Question 3

X

Answer 3

The score that we want to transform

Question 4

U

Answer 4

The population mean

Question 5

a

Answer 5

Population standard deviation

Question 6

What is a normal distribution

Answer 6

A symmetrical distribution in which the percentage of the score in each Pershke portion of the distribution is known

Question 7

When it is also a special type of symmetrical distribution

Answer 7

Normal distribution

Question 8

What is unit normal table

Answer 8

A table of the proportion of scores in a normal distribution form many different Z score of values

Question 9

When that contains the proportion of scores from different sections of the normal distribution from many Z score values

Answer 9

Unit normal table

Question 10

What is standard error

Answer 10

The estimate of sampling error that is determined from the standard deviation of the distribution of the sample means

Question 11

When we can calculate the standard deviation of the distribution of sample means

Answer 11

Standard error

Question 12

What is central limit theorem

Answer 12

The mathematical description of the shape of the Distribution of sample means that states that for a population with mean and standard deviation the distribution of sample means for sample size will have a mean equal to a standard deviation equal to the standard error and the shape of approaching a normal distribution as in becomes very large

Question 13

When is a mathematical description of the shape of the distribution of sample means that will allow us to determine if the distribution of sample means is normal shape

Answer 13

Central limit theorem

Question 14

Five steps of hypothesis testing process

Answer 14

One state hypothesis
Two set a decision criterion
Three collect sample data
Four calculate statistics
Five make a decision

Question 15

What is scientific or alternative hypothesis

Answer 15

The hypothesis that in effect or relationship exist in the population

Question 16

When a researcher made it a hypothesis that is in effect of the independent or subject variable exist

Answer 16

A scientific or alternative hypothesis

Question 17

What is null hypothesis

Answer 17

The hypothesis that an effect or relationship does not exist in the population

Question 18

We must consider a second hypothesis in our test is the opposite hypothesis to the scientific or alternative hypothesis

Answer 18

Null hypothesis

Question 19

What is two tailed hypothesis

Answer 19

Both directions of an effect or relationships are considered in the alternative hypothesis of the test

Question 20

When we are considering both possible directions of the difference between means in the hypothesis

Answer 20

Two tailed hypothesis

Question 21

What is a one tailed hypothesis

Answer 21

Only One Direction of an affect our relationship is predicted in the alternative hypothesis of the test

Question 22

What is alpha level

Answer 22

The probability level used by researchers to indicate the cut off probability level allow them to reject the Null hypothesis

Question 23

 The decision criterion value marks off a portion of the distribution that represents the most extreme

Answer 23

The alpha level

Question 24

What is critical region

Answer 24

The most extreme portion of the distribution of a statistical value for the null hypothesis determined by the decision criterion

Question 25

When is it the part where we look at to see if we can reject the no hypothesis

Answer 25

Critical region

Question 26

What is type I error

Answer 26

And air made in a hypothesis test when the researcher reject the null hypothesis when it is actually true

Question 27

What is called _______ ______ _____ Indicates that the researcher has rejected the null hypothesis when it is really true

Answer 27

Type I error

Question 28

What is type II error

Answer 28

An error made in the hypothesis when the researcher fails to reject the null hypothesis when it is actually false

Question 29

When can be made when the null hypothesis not rejected but its actually false

Answer 29

Type II error

Question 30

What is power

Answer 30

The ability of a hypothesis test to detect an effect or relationship when one exist

Question 31

What do you increase your hypothesis test to detect an effect on relationships that actually exist

Answer 31

power

Question 32

What does significant test mean

Answer 32

P value is less than or equal to the alpha level in an inferential test and null hypothesis this can be rejected

Question 33

 Standard error

Answer 33

Population standard deviation divided by the square root of the sample size

Question 34

One sample Z test

Answer 34

Sample means minus the population mean divided by the standard error