Purchase Solution

Confidence interval: Use of Blackberries by students at OSU

Not what you're looking for?

Ask Custom Question

Suppose you have drawn a simple random sample of 225 students from OSU.
In this sample, 45 students own Blackberries. Let π denote the proportion of OSU students who own Blackberries. Construct a 95% confidence interval for π.

Suppose you have drawn a simple random sample of 100 students from OSU
and recorded how much money each student spent on room and board in Fall 2009. For your sample, sample mean (X) is $3500, and sample standard deviation (s) is $1500. Let μ denote the mean of this population. Construct a 95% confidence interval for μ

Purchase this Solution

Solution Summary

A Complete, Neat and Step-by-step Solution is provided in the attached file.

Solution Preview

Problem: Suppose you have drawn a simple random sample of 225 students from OSU
In this sample, 45 students own Blackberries. Let π denote the proportion of OSU students who own Blackberries. Construct a 95% confidence interval for π.

Data: n p %
225 0.2 95

Standard Error, SE = Ö{p(1 - p)/n} = ...

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.

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.

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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.