# Interval Estimation & Margin of Error

Not what you're looking for?

# 1. use the sample data and confidence level to construct the confidence interval estimate of the population proportion p.

n= 550, x= 440, 95% confidence

< p <

#2 use the given confidence level and sample data to find (a) the margin of error and (b) the confidence interval for the population mean m. assume that the population has a normal distribution .

Weight lost on a diet 99% confidence ; n = 61 xbar= 4.0kg, s= 5.8 kg

##### Purchase this Solution

##### Solution Summary

The solution provides step by step method for the calculation of confidence interval for population mean and population proportion and margin of error. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

##### Solution Preview

Please see the attachments.

Solving these problems

1. Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p.

n= 550, x= 440, 95% confidence

< p <

Answer

90% Confidence Interval for proportion is given by

where p = x/n = 440/550 = 0.80, = 1.959963985, n = 550

= (0.767, 0.833)

= 0.767 < p < 0.833

Thus with 95% confidence we can claim that the population proportion is within (0.767, ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.