Posted by **mike** on Monday, July 25, 2011 at 8:44pm.

A population of 200 voters contains 52 Republicans, 128 Democrats, and 20 independents and members of other parties. A simple random sample of 20 voters will be drawn from this population. The expected number of Republicans in the sample is ______ ?

The standard error of the number of Republicans in the sample is _____ ?

- Basic Statistics -
**Jaz**, Tuesday, May 27, 2014 at 6:13am
Q1. A population has a mean of µ = 80 with σ = 20.

a. If a single score is randomly selected from this population, how much distance, on average, should you find between the score and the population mean?

b. If a sample of n = 4 scores is randomly selected from this population, how much distance, on average, should you find between the sample mean and the population mean?

c. What is the probability that sample mean will be less than 70 for a sample of 16 scores?

## Answer this Question

## Related Questions

- statistics - A population of 200 voters contains 52 Republicans, 128 Democrats, ...
- Statistics- Standard Error - A population of 200 voters contains 52 Republicans...
- Basic Statistics - A population of 300 voters contains 147 Republicans, 135 ...
- ggc - In a random sample of 200 registered voters, 120 indicated they are ...
- Stats - A random sample of two hundred fifteen adults is selected from a certain...
- Math - A town has 4900 registered voters, each of whom is either a Republican, a...
- Social Studies - Who were the Bourbon Democrats main opposition? a Republicans b...
- Math - in salem, 42% of the registered voters are republicans and 44% are ...
- Statistics - A study in a particular state found that only 5% of the voters have...
- SOCIAL STDIES HELP! - Which of the following groups or people controlled Georgia...