Test difference of proportions

Assignment Help Basic Statistics
Reference no: EM132849237

A survey of 430 randomly chosen adults found that 21% of the 222 men and 18% of the 208 women had purchased books online. A researcher used a Z Test Difference of Proportions to investigate this observed difference in proportions and calculated p-value 0.22.a. Each of the following conclusions is wrong. Briefly explain why.

I. There is strong evidence that men are more likely than women to purchase books online.

II. Since the p-value is high, we have evidence that there is no difference in the proportions of men and women who buy books online.

III. There is a 22% chance that the same proportion of men and women buy books online.

b. What is a meaningful conclusion for this hypothesis test.

Reference no: EM132849237

Questions Cloud

Determine the population variance for water : The American Water Works Association reports that, on average, men use between 40 L and 60 L of water daily to shave when they leave the water running. Suppose
How a research question and a hypothesis are similar : There are many similarities between a research question and a hypothesis. In fact, many researchers use the terms interchangeably. However, there are some impor
Compute the value of the test statistic : A stockbroker at Critical Securities reported that the mean rate of return on a sample of 11 oil stocks was 2.78% with a standard deviation of 5.5%. The mean ra
What is the probability that only one letter is inserted : What is the probability that only one letter is inserted in the proper envelope?
Test difference of proportions : Test Difference of Proportions to investigate this observed difference in proportions and calculated p-value 0.22.a. Each of the following conclusions is wrong.
Why does the dependent t test give contradictory results : Why does the dependent t test give contradictory results to the independent t test on the same data?
What is the point estimate : The sample mean is computed to be $35,420 and the sample standard deviation is $2,050. What is the point estimate?
Develop a personal development plan : MBA 530 Leading People and Organizations Assignment - Personal Development Plan, Southern New Hampshire University, USA
State the value of the sample slope : Computer output for fitting a simple linear model is given below. State the value of the sample slope for this model and give the null and alternative

Reviews

Write a Review

Basic Statistics Questions & Answers

  Calculate the sample mean for sample

Describe how to calculate the sample mean for this sample? How can Joan use this information?

  Interval for the expected number of deaths

Redo Exercise 61 when the dosage is 20 milligrams. Note the greatly increased width of the confidence limits for the expected number of deaths and of the limits of prediction. This example illustrates that extrapolation, estimating a value of Y fo..

  Find an elementary matrix

Is it possible to find an elementary matrix E such that EB = C? Justify your answer in a proof. Write the matrix 3 -2 as a product of elementary matrices.

  Comparison of two populations

A seven year old study reported that women whose mothers used the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as women whose mothers did not take the the drug.

  Personality characteristics and physical characteristics

Sheldon (1940) examined the relationship between personality characteristics and physical characteristics (body shape)

  Calculate ss-variance and standard deviation

-Calculate SS, variance, and standard deviation for the following sample of n = 6 scores: 11, 0, 8, 2, 4, 5. (The definitional formula works well with these sco

  Tree diagram from written description

A study showed that 60% of The Wall Street Journal subcribers watch CNBC every day. Of these, 70% watch it outside the home. Only 20% of those who don't watch CNBC every day watch it outside the home.

  Which were uncertain because of alicias lack of knowledge

Which of them were uncertain because the outcome was not yet determined and which were uncertain because of Alicia's lack of knowledge of the outcome?

  Tasks are sent to a supercomputer at an average rate of 6

tasks are sent to a supercomputer at an average rate of 6 tasks per minute. their arrivals are modeled by a binomial

  Formulate the above problem as a lp problem

1. Formulate the above problem as a LP problem. 2. Can the above problem be solved graphically? Why or why not?

  Estimated regression equation

Suppose you are given the following estimated regression equation: Debt Ratio = 4000 + .20 Cash Flow. If the t-stat for the slope estimate is 3.25, what can you conclude?

  How many different ways can you do this

You have a group of twelve people. You need to pick a president, treasurer, and secretary from the twelve. How many different ways can you do this?

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