Purchase Solution

Sample for Height, Hourly Wage and Poll

Not what you're looking for?

Ask Custom Question

1. People in a large population average 60 inches tall. You will take a random sample and will be given a dollar for each person in your sample who is over 65 inches tall. For example if you sample 100 people and 20 turn out to be over 65 inches tall, you will get $20. Which is better: a sample of size 100 or a sample of size 1,000? Chose one and explain. Does the law of averages relate to the answer you give?

2. Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error of less than 1%. Roughly how large a sample would be needed for such a poll?

Purchase this Solution
Solution Summary

The answers are given with full calculations displayed in 590 words with a reference link.

Solution Preview

1) This is an interesting question. In a normal population, the height of individuals would follow a bell curve, where the middle of the curve (the highest point) would be at 60 inches. Then, we would get people who are taller or shorter than 60 inches, as you move away from the middle. If you look at the rules of the bell curve, 68% of the population would be within 1 standard deviation of 60 inches, 95% would be within 2 standard deviations, and 99% would be ...

Purchase this Solution
Free BrainMass Quizzes
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.

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

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

View More Free Quizzes
Related BrainMass Solutions

  • International Labor Wages

    ANSWER: $23.50+24.50=50/40 =$24.11 What you have done is adding up the two amounts given in the question $23.50 and $24.50. This does not reflect the average wage for the German workers. The sample average is the hourly wage of $24.01.

  • Hourly workers mean wage calculation

    102823 Hourly workers mean wage calculation The mean wage for hourly workers at a plant {= $14.25} per hour. Assume that the population standard deviation is{$2.00}.

  • Hypothesis

    4168 Hypothesis Testing Techniques for Confidence Intervals Use these data and hypothesis-testing techniques along with a 5% level of significance to determine whether the mean hourly wage of a manufacturing worker has changed.

  • Labor Rates

    Bureau of Labor Statistics (http://www.bls.gov) released hourly wage figures for western countries in 2000 in the manufacturing sector. The hourly wage was $24.01 in Germany, $22.00 in Japan, and $19.86 in the United States.

  • Multiple regression analysis for wage data

    Based on the Current Population Survey (CPS) of March 1995, Paul Rudd extracted a sample of 1289 workers, aged 18 to 65, and obtained the following information on each worker: Wage = hourly wage in $ Age = age in years Female = 1 if female

  • Sampling Variability and Standard Error

    254806 Sampling Variability and Standard Error Based on a simple random sample of one hundred an analyst estimates the average hourly wage earned by workers in a city to be $30 and computes the margin of error to be $5.

  • Finding the Confidence Interval at 95% Confidence

    What is the 95% confidence interval for the average hourly wage of all information system managers? Solution: Margin of error = critical value*standard deviation/sqrt(sample size).

  • Null Hypotheses

    Last year's mean hourly wage was $8.16, and there is reason to believe that this year's value is different from last year's.

  • Three Statistics Multiple Choice Questions in Mean

    The overall R2 for the regression model with hourly wage as the outcome, and gender, age, union membership, and occupation type as predictors is 25%.

View More Related Solutions