Z-TEST

Question 1

______ testing is the process of making an inference or a generalization on a population based on the results of the study on samples.

Answer 1

Hypothesis

Question 2

______ hypothesis testing

A guess or prediction made by a researcher regarding the possible outcome of the study.

Answer 2

Statistical

Question 3

Two types of statistical hypothesis

Answer 3

Null (H0) and Alternative (Ha)

Question 4

The hypothesis to be tested which one hopes to reject. It shows equality or no significant difference or relationship between variables.

Answer 4

Null Hypothesis (H0)

Question 5

The idea which the researcher wants to prove.

Answer 5

Alternative Hypothesis (Ha)

Question 6

One-tailed test (___ directional)
The region of rejection is on the ____, used when Ha uses comparatives such as greater than, higher than, better than, superior to, exceeds, etc.

Answer 6

right tail

Question 7

Types of hypothesis testing
- One-tailed (Right directional)
- One-tailed test (Left directional test)
- Two-tailed test ( __ directional test)

Answer 7

Non-directional

Question 8

One-tailed test (Left directional)
The region of ____ is on the left tail, used when Ha uses comparatives such as less than, smaller than, inferior to, lower than, below, etc.

Answer 8

rejection

Question 9

One-tailed test (Left directional)

The region of rejection is on the left tail, used when Ha uses comparatives such as less than, smaller than, inferior to, lower than, below, etc.

Answer 9

True

Question 10

Two-tailed test
Used when Ha uses words such as not ____ to, significantly different, etc.

Answer 10

equal

Question 11

_____ errors in hypothesis testing
- Type I
- Type II

Answer 11

Statistical

Question 12

Type I error
The error is committed when the null hypothesis is rejected when in fact it is true and the alternative hypothesis is ___.

Answer 12

false

Question 13

Type II error
Error committed when the ____ is accepted when in fact it is false and the alternative hypothesis is true.

Answer 13

null hypothesis

Question 14

___ (α)

Probability of committing a Type I error

Answer 14

Alpha

Question 15

Statistical hypothesis testing

Answer 15

A guess or prediction made by a researcher regarding the possible outcome of the study.

Question 16

Beta (β)
Probability of committing a Type II error

Answer 16

True

Question 17

The most popular levels of significance of alpha (α) are the 0.01 and 0.05 levels.

Answer 17

True

Question 18

Using p-value
Reject ___ if the probability is less than or equal to α

Answer 18

H0

Question 19

Types of Test Statistics for Hypothesis Tests Concerning Means
Z-test (used when n is large, n ≥ 30)
Z-test for comparing _ sample means (when population standard deviation is given)
Z-test for comparing 2 sample means (when sample standard deviation is given). True or False

Answer 19

True

Question 20

Is this the formula for Z-test statistics?

Z = (X - μ) / (σ / √n)

Answer 20

True

Where: σ is the population standard deviation, X is the sample mean, μ is the population mean, and n is the sample size.

Question 21

Calculating Z-test statistics for comparing 2 sample means (when population standard deviation is given)

Z = (X1 - X2) / (σ / √(1/n1 + 1/n2))

Answer 21

True

Where: σ is the population standard deviation, X1 is the mean of the first sample, X2 is the mean of the second sample, n1 is the size of the first sample, n2 is the size of the second sample

Question 22

A two-tailed test is used when Ha uses words such as _____

Answer 22

not equal to, significantly different etc.