Difference between population proportions

Assignment Help Basic Statistics
Reference no: EM13111384

It is asserted that a greater proportion of males (= x 1 ) contribute to charity than females (= x 2 ). A survey of male and female contributors to charity showed that of 900 males surveyed, 86 contributed to charity, and of 1200 females surveyed, 107 contributed to charity. Assume the sample statistics are from random, independent samples.

State the Null, and Alternative , hypotheses to be tested, noting whether the test is a right-tailed, left-tailed , or two tailed test and test the hypothesis that the proportion of charitable givers are the same for both males and females. Test at the level alpha = 0.05.

Reference no: EM13111384

Questions Cloud

Hypothesis testing of political persuasions : You are curious about whether the professors and students at your school are of different political persuasions, so you take a sample of 20 professors and 20 students drawn randomly from each population.
Compute the value of the standard error of the sampling : Compute the value of the standard error of the sampling distribution of sample proportions (standard error of the proportion)
Describe the evolution of partnering : Briefly describe the evolution of partnering. Discuss the forces that contributed to this approach of selling. Diagram and label the four-concept Consultative Sales Presentation Guide.
What are the mean earnings of males and females in sample : What are the mean earnings of males and females in this sample? Does the regression result support the claim in the news?
Difference between population proportions : It is asserted that a greater proportion of males (= x 1 ) contribute to charity than females (= x 2 ). A survey of male and female contributors to charity showed that of 900 males surveyed
How much money you want to deposit : Your local bank will guarantee a 6% annual interest rate thus long as you have money in the account. a) How much money you want to deposit into the account today?
Describe the four major sources of sales training : According to the Strategic/Consultative Selling Model, what are the three prescriptions for developing a successful personal selling philosophy? List and briefly describe the four major sources of sales training.
Compute the amount lyle would withdraw : Lyle O'Keefe invests $30,300 at 10% annual interest, leaving the money invested without withdrawing any of the interest for 10 years. At the end of the 10 years, Lyle withdrew the accumulated amount of money. Compute the amount Lyle would withdraw as..
Deliberate the professional values : Deliberate the professional values that most challenge the values as well as assumptions that you learned in your family and culture.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Likelihood ratio test of two beta density

Find the distribution of the test statistic when the null hypothesis is true, and then show how to get a test size alpha= 0.10

  Statistics variance problem

We are interested in determining whether or not the variances of the sales at two music stores (A & B) are equal. A sample of 10 days of sales at store A has a standard deviation of 30, while a sample of 16 days of sales from store B has a standar..

  What is the probability that your mean flight

Assume that flight times from SAN to ATL are exponentially distributed with a mean of 4.5 hours and a standard deviation of 0.2 hours. Assume that you must fly from SAN to ATL weekly for the lucrative consulting engagement for one year (52 flight..

  Confidence interval for the mean daily caloric intake

Find a 95% confidence interval for the mean daily caloric intake. Interpret this interval.

  Optimal order quanity-rop

What is the total expected annual inventory cost at the optimal order quantity? What is the re-order point?

  Qualitative and judgmental statistical time-series

Explain the differences between qualitative and judgmental statistical time-series, and explanatory/causal forecasting models.

  Selecting a crew member at random

If we select a crew member at random, what is the probability the crew member earns:

  Hypothesis testing of sprinklers

Sprinkler Systems. A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at least 135 degrees F.

  Hypothesis testing-microwave oven repairer

A microwave oven repairer says that the mean repair cost for damaged microwave oven is less than $90. You work for the repairer and want to test this claim.

  Upper and lower control limits for testing

The yield strength of a metal bolt has a mean of 6,050 pounds with a standard deviation of 100 pounds. Twenty samples of three bolts were tested, resulting in the means shown below.

  Sampling-confidence-interval

r. Patton is a professor of English. Recently she counted the number of misspelled words in a group of student essays. She noted the distribution of misspelled words per essay followed the normal distribution with a standard deviation of 2.44 word..

  Diagrammatic representation and normal distribution

Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course:

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd