*Chapter 8

Question 1

Tstat Example:

Sample size 101
Sample Mean 1.5
Sample SD 1.4

What is the Tstat sample mean?

Answer 1

Question 2

Tstat Formula

Answer 2

Question 3

Type 1 error

Answer 3

Question 4

Type 2 Error

Answer 4

Question 5

P Value and Significant

(1) When to reject
(2) if pvalue of test is 2.13 -
Do we reject or not reject for:
5%
3%
1%

Answer 5

Question 6

Tstat for difference in means

Answer 6

Question 7

Answer 7

Question 8

Testing mean difference
- Formula
- Dependent or Independent?
- DF

Answer 8

Question 9

Testing single variance
X^2 Chi-Stat

Answer 9

Question 10

Testing two variance
F test

Answer 10

Question 11

Confidence Intervals Significant for:

99%
95%
90%
68%

And interpretation

Answer 11

99% +/- 2.58
95% +/- 1.96
90% +/- 1.65
68% +/- 1

for 95%, with 5% significant ( 100-95 = 5), we need to go + or - 1.96 to hit the tail.

Question 12

Which Test to use?
(1) Hypo concerning pop mean
(2) test equality of two pop means
(3) Test equality of two pop means where samples are independent
(4) Hypo concerning pop VARIANCE
(5) Test quality of two pop variance

Answer 12

(1) T or Z
(2) T
(3) Difference of means and not paired comparison
(4) Chi
(5) F

Question 13

Hypo test of.. which test and what is the df?

Answer 13

Question 14

Value of pop variance.
What is it testing
What is formula

Answer 14

Question 15

Comparing two pop variances

Answer 15

Question 16

Parried comparison test

Answer 16