PARAMETRIC Pt.1

Question 1

2 types of hypothesis Tests

Answer 1

o Parametric Test
o Nonparametric test

Question 2

PARAMETRIC TESTS

Answer 2

• Assumed distribution is NORMAL
• Assumed variance is homogenous
• Typical data is/are ratio or interval
• Data set relationships are usually independent
• Usual central measure is mean
• Benefits: can draw more conclusions

Question 3

• Assumed distribution is NORMAL
• Assumed variance is homogenous
• Typical data is/are ratio or interval
• Data set relationships are usually independent
• Usual central measure is mean
• Benefits: can draw more conclusions

Answer 3

PARAMETRIC TESTS

Question 4

Analysis where we compare against our historical or global value
o t-test
o z-test

Answer 4

ONE SAMPLE: PARAMETRIC TEST

Question 5

Analysis where we compare a control group versus test group

Answer 5

TWO SAMPLE: PARAMETRIC TEST

Question 6

2 samples have no relationship
with each other

Answer 6

Independent Samples

Question 7

Samples are dependent to each
other

Answer 7

Paired Samples

Question 8

Normal
Homogeneous
Ratio or Interval
Independent
Mean
Can draw more conclusions

Answer 8

Parametric

Question 9

Any
Homogenous and Heterogeneous
Ordinal or Nominal
Any
Median
Simplicity: Less affected by outliers

Answer 9

Non-parametric

Question 10

Samples must be independent of each other. There can be no relationship between the subjects in each sample

Answer 10

Z TEST FOR TWO MEANS

Question 11

Z TEST FOR TWO MEANS: The standard deviations of both populations must be

Answer 11

known

Question 12

Z TEST FOR TWO MEANS: Samples must be _______________ of each other. There can be no relationship between the subjects in each sample

Answer 12

independent

Question 13

Z TEST FOR TWO MEANS: If the sample sizes are _____ than 30, the population must be normally or approximately normally distributed.

Answer 13

less

Question 14

observed value –

Answer 14

mean difference

Question 15

expected value –

Answer 15

hypothesis

Question 16

If there is no difference in population means (based on the second hypothesis), subtracting them will give the difference of ____

Answer 16

zero

Question 17

T OR F| But if there is difference in population means, subtracting them will give a number other than zero

Answer 17

T

Question 18

Z TEST FOR TWO MEANS: Using __ value to compute for p-value

Answer 18

z-value

Question 19

FOR Z TEST FOR TWO MEANS: P-value to compare with ______

Answer 19

alpha

Question 20

a parametric test that is usually used to measure significant difference of small sample sizes.

Answer 20

T TEST

Question 21

Compares same variable from same group

Answer 21

Dependent t-test

Question 22

Compares same variable but different group

Answer 22

Independent t-test

Question 23

Use T-test when?

Answer 23

✓ When standard deviation is not known
✓ When sample size is less than 30

Question 24

is used for the comparison of two variance or standard deviation

Answer 24

F test

Question 25

In statistics, the number of ________________ is the number of values in the final calculation of a statistic that are free to vary (sample size – 1).

Answer 25

degrees of freedom

Question 26

HOW TO USE THE F TEST
→ For the comparison of two sample / population variances or standard deviations which should be _______________ from each other

Answer 26

independent

Question 27

Characteristics of the F Distribution
1. The values of F cannot be _______, because variances are always ___________ or zero.
2. The distribution is ________ skewed.
3. The mean value of F is approximately equal to __.
4. The F-distribution is a family of curves based on the degrees of freedom of the variance of the numerator and the degrees of freedom of the variance of the denominator

Answer 27

1. negative/ positive
2. positively
3. 1