Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Comparison of Observational as well as Experimental Study Designs.

describe Standardized test scores.

For his Statistics class experiment researcher J.Gilbert obvious to study how parent's income affects children's performance on standardized tests like the SAT. He anticipated to collect information from a random sample of test takers as well as examine the relationship between parental income as well as SAT score.

1) Is this an experiment? If not, what kind of study is it?

2) If there is relationship between parental income and SAT score why can't we conclude that dissimilarities in score are caused by differences in parental income?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922195

Have any Question? 


Related Questions in Statistics and Probability

Two six-sided balanced dice are thrown find the

Two six-sided (balanced) dice are thrown. Find the probabilities of each of the following events: (a) a= 5 does not occur on either throw; (b) the sum is 7; (c) a 5 and a 3 occur in any order; (d) the first throw is a 5 ...

Let x andnbsp y be zero-mean unit-variance gaussian random

Let X and  Y be zero-mean, unit-variance Gaussian random variables with correlation coefficient, P . Suppose we form two new random variables using a linear transformation: Find constraints on the constants a, b, c and d ...

Suppose x is a vector of iid random variables where each

Suppose X is a vector of IID random variables where each element has some PDF,    Find an example PDF such that the median is a better estimate of the mean than the sample mean.

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise safety. (a) How large a sample would be needed to estimate the true proportion of jets with the wir ...

A certain random process is created as a sum of a large

A certain random process is created as a sum of a large number, , of sinusoids with random frequencies and random phases, where the random phases θ K  are IID and uniformly distributed over   and the random frequencies a ...

Find an expression for the mth moment of an erlang random

Find an expression for the m th moment of an Erlang random variable whose PDF is given by   for some positive integer   and positive n constant b.

Question 1visit the australian stock exchange website

Question 1: Visit the Australian Stock Exchange website, www.asx.com.au and from "Prices and research" drop-down menu, select "Company information". Type in the ASX code "WPL" (Woodside Petroleum Limited), and find out d ...

A workstation is used until it fails and then it is sent

A workstation is used until it fails and then it is sent out for repair. The time between failures, or the length of time the workstation functions until it needs repair, is a random variable . Assume the times between f ...

Estimation of range and bearing angle -1 bearing-angle

Estimation of Range and Bearing Angle - 1. Bearing-angle estimation A passive detection system consists of two acoustic receivers. The separation between the receivers is 2.5 meters. The acoustic propagation speed in air ...

You collect a sample size nshy1 of data and find that a 90

You collect a sample size N ­1 of data and find that a 90% confidence level has width, w. What should the sample size N 2 be to increase the confidence level to 99.9% and yet maintain the same interval width, w?

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate