User Account

All Pages

Which of the given are possible confounding variables

Assignment Help Basic Statistics
Reference no: EM131718968

Question: Suppose that an observational study showed that students who got at least 7 hours of sleep performed better on exams than students who got less than 7 hours of sleep. Which of the following are possible confounding variables, and which are not? Explain why in each case.

a. Number of courses the student took that term.

b. Weight of the student.

c. Number of hours the student spent partying in a typical week.

Reference no: EM131718968

Questions Cloud

Discuss the american psychological association : The American Psychological Association (APA) has mandated that all psychologists should become culturally competent
What is the amount of each payment : Each of the four payments must be paid at the end of the next three years. What is the amount of each payment? Please round to the nearest whole number
Supply chain logistics management : Aggregate inventory data suggest that while overall average inventory levels are declining, the relative percentage being held by manufacturers is increasing.
What is the npv of this project : A proposed project lasts 3 years and has an initial investment of $500,000. What is the NPV of this project?
Which of the given are possible confounding variables : Suppose that an observational study showed that students who got at least 7 hours of sleep performed better on exams than students who got less than 7 hours.
What is the path goal theory of pope francis : What is the path goal theory of Pope Francis? What are the directive,supportive,participative, and achievement leadership of Pope Francis?
Direct lobbying as a type of lobbying : Are there any other types of lobbying? From your research, is their one type of lobbying that is more effective?
Project management and design of goods and services : project management and design of goods and services. Define, give an example and indicate the importance of each topic.
Contrast the five types of organizational structures : Compare and contrast the five types of organizational structures: vertical functional, divisional, matrix, team, and virtual network.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Calculate confidence interval for the popular mean

For the following data calculate the mean and standard deviation for the sample. Then calculate both a 95% and a 99% confidence interval for the popular mean.

  Determining sample size-nlrb

Suppose that the National Labor Relations Board (NLRB) wishes to estimate the average hourly wage rate for a certain classification of skilled workers. It wishes to be 95% certain to get an estimate of sample mean within 0.05 of the truth.

  What would be the null and alternative hypotheses

If we wished to test whether this percentage could be the same for women in this age group living in New York City and selected a random sample of 300 such individuals from New York, what would be the null and alternative hypotheses? Would the tes..

  Finding optimal assignment and total minimum cost

Find out optimal assignment and calculate total minimum cost.

  The table below summarizes baseline characteristics on

the table below summarizes baseline characteristics on patients participating in a clinical trialcharacteristicplacebo

  Of the 504 melt ponds what proportion had landfast ice

The University of Colorado researchers estimated that about 17% of melt ponds in the Canadian arctic have first-year ice. Do you agree?

  Test the claim using a hypothesis test show all work test

in a random sample of males 23 write with their left hand and 217 do not. 65 females write with their left hand and 455

  Suppose the current price of gold is 930ounce suppose also

suppose the current price of gold is 930ounce. suppose also that the price 1 month from today has a normal distribution

  Find the probability that the one-year return of this stock

suppose that the annual rate of return for a common biotechnology stock is normally distributed with a mean of 5 and a

  What is the head circumference

Explain whether or not it would be unusual for an adult male to have a 52-cm head circumference.- Explain whether or not it would be unusual for an adult male to have a 62-cm head circumference.

  Case study-executive camera company

The Executive Camera Company provides full expenses for its sales force. When attempting to budget automobile expenses for its employees, the financial department uses mileage figures to estimate gas, tire, and repair expenses.

  Determine the cross correlation function

The unit impulse response of a discrete linear filter is given - Determine the cross-correlation function between the input and output random sequences.

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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