From 891dc4e6d635d30e4a9c86c41b6abd87930416f4 Mon Sep 17 00:00:00 2001 From: alexanderthclark Date: Sun, 24 Mar 2024 15:08:11 +0000 Subject: [PATCH] deploy: 49619f351af915fa39e345e525e5e7b27c1bc910 --- _sources/confidenceintervals.md | 28 +++++++++++++++++++++++++++- chancevary.html | 6 +++--- confidenceintervals.html | 29 ++++++++++++++++++++++++++++- correlation.html | 12 ++++++------ normal.html | 6 +++--- objects.inv | Bin 4630 -> 4664 bytes regression.html | 12 ++++++------ searchindex.js | 2 +- 8 files changed, 74 insertions(+), 21 deletions(-) diff --git a/_sources/confidenceintervals.md b/_sources/confidenceintervals.md index 5c087af..c20185e 100644 --- a/_sources/confidenceintervals.md +++ b/_sources/confidenceintervals.md @@ -90,4 +90,30 @@ Once the SE is found, a confidence interval is constructed like in the case of p ## Exercises -TK \ No newline at end of file +```{exercise-start} +:label: CIicecream +``` +In a survey of 96 randomly selected Americans, $\hat{p} = 0.60$ said they think ice cream should be banned. Find the 95% confidence interval for the proportion. +```{exercise-end} +``` + +```{exercise-start} +:label: CInarrow +``` +You are interested in the 95% confidence interval of a sample mean. Which of the following makes this interval more narrow? + +1. More observations. +2. Fewer observations. +3. Higher value of the average. +4. Lower value of the average. +5. Both 1 and 4 +```{exercise-end} +``` + +```{exercise-start} +:label: CImc +``` +Consider a multiple choice exam with choices A, B, C, D, and E for each question. Assume that the probability that a particular question has the answer $C$ is $p = 0.2$ and that all letter answers are determined independently. Find a 90% confidence interval for the proportion of questions that will have a correct answer of C on a 1600-question exam. +```{exercise-end} +``` + diff --git a/chancevary.html b/chancevary.html index 6915993..b7cccf3 100644 --- a/chancevary.html +++ b/chancevary.html @@ -945,11 +945,11 @@

Normal Approximation
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