Determining possible confounds

Assignment Help Basic Statistics
Reference no: EM1395268

Identify some possible confounds in this study.

A psychology professor is interested in whether implementing weekly quizzes improves student learning. She decides to use the weekly quizzes in one section of her introductory psychology class and not to use them in another section of the same course.

Reference no: EM1395268

Questions Cloud

Mean systolic blood pressure for population african-american : We wish to know if, on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African-American men is greater than 140.
Computing coefficient of determination : In a regression analysis, the sum of the squared deviations between y and y-bar is SST = 200.0. If the sum of the squared deviations about the regression line is SSE + 40.0, what is the coefficient of determination?
Statistical concepts clarification : What type of research design is the strongest when I what to adopt a new educational program? Using a pre-test and post-test with control group, the previous method but without the control group.
Drivers in the sample regularly wear a seatbelt : Between 180 and 230 (inclusive) of the drivers in the sample regularly wear a seatbelt? Hint: Use the BINOMDIST function in Excel.
Determining possible confounds : A psychology professor is interested in whether implementing weekly quizzes improves student learning. She decides to use the weekly quizzes in one section of her introductory psychology class and not to use them in another section of the same cou..
Describe why biodiversity is important to ecosystem health : Describe why biodiversity is important to ecosystem health, even in an agricultural setting where most often farmers are paid for a single, pure product like wheat or corn.
In what means usn and usmc fought pacific war : Explain how and in what means did USN and USMC fight Pacific War? What battles early in campaign were very Mahanian and why? Explain was this a good strategy?
Estimate the mean amount of time : An advertising agency that serves a major radio station wants estimate the mean amount of time that the station's audience spends listening to the radio daily.
Problem on neimann pick disease : Niemann-Pick disease is a fatal lysosomal storage metabolic disorder casued by an autosomal recessive allele. A couple, both of whom are heterozygous for the allele are wanting to start a family.

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Probability of sample mean leads no rejection

N=120, population standard deviation is (known) 5, alpha =.05, standard error of the mean (sigma of xbar)= .46, h0 is rejected if xbar

  Question on control chart

Determine the upper and lower control limits for ?- (This Symbol Is Supposed to be an x not an a) and R-charts for the width of a chair seat when sample grand mean

  Weighted aggregate price index question

Fresh fruit prices and quantity data for years 1988 to 2001 follow (Statistical Abstract of United States, 2002). Quantity data reflect per capita consumption in pounds and prices are per pound.

  Calculate a weighted aggregate price index

To find weighted aggregate price index using Laspeyres and Paasche method.

  Probability that exactly one woman is selected

Satellite Office Systems has vacancies for two executives that it will fill from among four women and six men. What is the probability that exactly one woman is selected?

  At ninety five percent-test the above hypotheses

Determine the p-value; and at 95% confidence, test the above hypotheses.

  Fixed and variable costs alternatives

You are working on an analysis of your company's current cost structure reviewing the various fixed and variable costs within your firm. Your objective is to maximize your firms profit.

  The probability that the freshman selected at random

Among 500 freshmen pursuing a business degree at a university, 347 are enrolled in an economics course, 204 are enrolled in a mathematics course, and 160 are enrolled in both an economics and a mathematics course.

  Pretest-posttest design

Pretest-posttest design and internal validity threats - please discuss all threats to internal validity.

  Probability of the diameter of a selected bearing

The diameters of ball bearings are distributed normally. The mean diameter is 74 millimeters and the variance is 16. Find the probability that the diameter of a selected bearing is less than 78 millimeters.

  Determining probability that the student is a boy

Provided that the selected student excels in sports, determine the probability that the student is a boy?

  Population mean is less than a specified value

To test whether the population mean is less than a specified value.

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