In this activity students use confidence intervals to estimate the difference of two population proportions. First they find the intervals by calculating
•Bring 2 sheets of notes and calculator to midterm. for difference in two proportions ... confidence interval includes the population parameter.
Lecture Compact
1/10/2018 We used a 90% confidence level and Statcato to calculate the following two-population proportion confidence interval.
section F intro to stats for community college students
If the sample proportions are different from those specified when running these procedures the interval width may be narrower or wider than specified.
Confidence Intervals for the Ratio of Two Proportions
Confidence intervals are also the same process except that the formula is different. Section 9.1 Two Proportions. There are times you want to test a claim
chapter
population proportion and its confidence interval (CI). Estimating the proportion confidence interval formula for a proportion: pˆ qˆ. )4(. /ˆˆ. ˆ. 2/.
MWSUG P
always the formula is: pˆ. 2. 1. ˆˆ pp. -. Sample estimate ± multiplier × standard error confidence interval includes the population parameter.
Lecture Compact
Example 6: Find a 90% confidence interval for the difference in population proportions where x1 = 14 n1 = 40
conf
test() can be used with two sample proportions to calculate a confidence interval for the difference between the two population proportions. You only need to
chapter
confidence interval for the population proportion p is. (. ) │. ⎠. ⎞. │. ⎝. ⎛. -. ± n p p zp. ˆ. 1. ˆ. ˆ. 2/ α . Press the [STAT].
TI or TI for non Business Statistics