6 Confindence Interval

Question 1

What is a:
1.) Population
2.) Sample
3.) Parameter
4.) Statistic

Answer 1

Question 2

Sample Means and sample proportions ex1

Answer 2

Question 3

What is the following and formulas for:
1.) Sampling error
2.) Nonsampling error
3.) Sample mean
4.) Sample Variance

Answer 3

Question 4

Sample data ex1

Answer 4

Question 5

Properties of sampling distributions of x bar:

1.) sample mean
2.) sample standard deviation
3.) z-score
4.) what is the central limit theorem ?

Answer 5

Question 6

Sample Means and sample proportions ex2

Answer 6

Question 7

Sampling Distribution Of Sample Proportions:
1.) mean
2.) standard deviation
3.) z-score

Answer 7

Question 8

Sampling Distribution Of Sample Proportions ex1

Answer 8

Question 9

Confidence Interval For proportions

Answer 9

Question 10

1.) How do we interpret our confidence interval or what to say once we get the interval?

2.) What is the acronym when construction confidence intervals?

Answer 10

Question 11

Confidence Interval For One-Sample Proportions:

1.) margin of error
2.) critical value for 90%
3.) critical value for 95%
4.) critical value for 99%

Answer 11

Question 12

Confidence Interval For One-Sample Proportions ex1

Answer 12

Question 13

Confidence Interval For One-Sample Proportions ex2

Answer 13

Question 14

Confidence Interval For One-Sample Proportions ex3

Answer 14

Question 15

Confidence Interval For Two-Sample Proportions:

1.) point estimate
2.) critical number
3.) standard deviation
4.) margin of error

Answer 15

Question 16

Confidence Interval For Two-Sample Proportions ex1

Answer 16

Question 17

Confidence Interval When Standard Deviation is Known(Population Means):

1.) point estimate
2.) critical number
3.) standard deviation
4.) margin of error

Answer 17

Question 18

Confidence Interval When Standard Deviation is Known(Population Means) Ex1

Answer 18

Question 19

Confidence Interval When Standard Deviation is Known(Population Means) Ex2

Answer 19

Question 20

Confidence Interval When Standard Deviation is Unknown(Population Means):

1.) point estimate
2.) critical number
3.) standard deviation
4.) margin of error

Answer 20

Question 21

Confidence Interval When Standard Deviation is Unknown(Population Means) Ex1

Answer 21

Question 22

Confidence Interval When Standard Deviation is Unknown(Population Means) Ex2

Answer 22

Question 23

Confidence Interval When Standard Deviation is Unknown(Population Means) Ex3

Answer 23

Question 24

Two-Sample Confidence Intervals for Population Means(known standard deviation):
1.) Point estimate
2.) margin of error

Answer 24

Question 25

Two-Sample Confidence Intervals for Population Means (known standard deviation) ex1

Answer 25

Question 26

Matched-Pair Two-Sample Confidence Interval:

1.) Point estimate
2.) margin of error
3.) When to use a matched-pair?

Answer 26

Question 27

Matched-Pair Two-Sample Confidence Interval ex1

Answer 27

Question 28

Matched-Pair Two-Sample Confidence Interval ex2

Answer 28

Question 29

Unmatched-Pair Two-Sample Confidence Interval:

1.) When do use unmatched-pair ?
2.) How do we know when to pool or dont pool ?

Pool
1.) point estimate
2.) margin of error

Unpool
1.) point estimate
2.) margin of error

Answer 29

Question 30

Unmatched-Pair Two-Sample Confidence Interval ex1

Answer 30

Question 31

Unmatched-Pair Two-Sample Confidence Interval ex2

Answer 31

Question 32

Give me the road map for confidence intervals for proportions, sample means, and two-sample means

Answer 32

Question 33

What is the formula for doing confidence intervals for variance ?

Answer 33