1 Proportion Z Interval

Question 1

2 Proportion Z Interval Conditions

Answer 1

Two proportions from SRS

Independent Samples

np > 10 and n(1-p) > 10 for BOTH samples

Population is 10x> sample for both samples

Question 2

<p>When do you use a 1 Proportion Z Interval??</p>

Answer 2

<p>When estimating for a population proportion.</p>

Question 3

<p>Conditions and assumptions?</p>

Answer 3

<p>- SRS

- np > 10, n(1-p) > 10
- Population is 10x sample size</p>

Question 4

<p>Formula for interval</p>

Answer 4

<p>p̂ ± z* (sqrt((p̂ * (1-p̂) / n))</p>

Question 5

2 Proportion Z Interval Formula

Answer 5

(p1 - p2) +/- z* ( ( (p1(1-p1)/n1) + (p2(1-p2)/n2) ) ^ (0.5) )