# Linked Questions

3answers
225 views

### Large sample confidence interval

Can someone please be so kind to check if my answer is correct
1answer
494 views

1answer
254 views

### Binomial confidence intervals and the Central Limit Theorem

Suppose I want to estimate the head probability p for a biased coin. Usually this is done by assuming the distribution tends to normal using large number of trials and CLT. I am wondering how robust ...
2answers
208 views

### Confidence interval in statistics

I really need help on this question. I am taking an introductory statistics class, and here is the question: A taxi company wants to determine if customers will accept self driving cars. The company ...
1answer
95 views

### Confidence interval for population proportion

You have a population of 10M people. Suppose you want to determine the share of people with a certain disease. To do so you randomly choose X people and check if ...
0answers
104 views

### 90% Confidence Interval for Population Proportion Given p' and n

I am trying to figure out why, for finding confidence intervals, we use the following standard error $$SE = \sqrt{\frac{p(1-p)}{n}}$$ in the formula $$\overline{X} \pm z_{(\alpha / 2)} \times SE$$ ...
1answer
48 views

### Find the 99% confidence interval (Interval and test for proportion)

I have the following question and I am getting different results from a friend (I think he forgot to halve $\alpha$). Problem is: A random sample of 100 students from a large school was taken. It ...
1answer
69 views

### Confidence Interval and Central Limit Theorem

Here's the problem: "During a test, we asked $120$ people who Jean-Jaques Rousseau was, and $12$ of them answered that he was a driver (which is false). Estimate the proportion of the population ...
1answer
62 views

### Computing confidence interval of a proportion using prop.test() in R

I am using prop.test() to calculate the confidence interval of a proportion. I found that prop.test() result differs from the z-...
1answer
31 views

### Statistics - Calculate probability of occurrence from small number of tests

I'm sure this is basic statistics, but I'm not even sure of the right words for the concepts I'm dealing with. I took statistics in college but it was ... well ... a few years ago. Let's say there's ...
1answer
40 views

### How to pick sample size?

I have a requirement where i want to perform testing of 1000 systems, but I want to limit or pick or sample size since the rest is assumed to have same configuration. Whats criteria to pick sample ...
1answer
27 views

### What sampling distribution does $\hat{p}$ in this scenario follow?

Homework question, not sure whether I should be using a normal distribution, a binomial distribution or a hypergeometric distribution. A mail-order company promises its customers that the products ...
1answer
32 views

### Calculating statistical significance

I have a dataset that holds the number of times a group of people used a type word in a survey at three different data collection points: People in Group - 158 People who use a word at T0 = 123 ...