Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Responsible whether the given study is observational or experimental

Label each of the subsequent as an observational or experimental study. For the investigational study state the control group and the treatment group.

1) A researcher finds that children whose parents smoke have more respiratory illness than children whose parents do not smoke have.

2) A teacher divides her class into two groups. One group is trained a lesson on the computer and the other is taught by traditional lecture. The teacher then gives a test to see which group has better grades.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921303

Have any Question? 


Related Questions in Statistics and Probability

Suppose that the number of men equals the number of women

Suppose that the number of men equals the number of women, and that Vera is last on the preference list of every man. Prove that under every stable matching, Vera is matched to the same man. Who is the unlucky guy?

Twenty years ago 40 children were born in the same hospital

Twenty years ago 40 children were born in the same hospital in Denmark. Researchers classified the children by whether or not they were breast-fed for at least 3 months. They were interested in whether breast-feeding ten ...

A shipment of 8 computers contains 2 with defects find the

A shipment of 8 computers contains 2 with defects. find the probability that a sample of size 4, drawn from the 8, will not contain a defective computer. What is the probability that a sample of 4 of the 8 computers will ...

Suppose there are three bills in a wallet one of the bills

Suppose there are three bills in a wallet. One of the bills is a $1 bill, one is a $5 bill, and the third is a $10 bill. You select two bills at random without replacement from the wallet, and note the value of the bills ...

Jolie takes 45 minutes to do her statistics homework if the

Jolie takes 45 minutes to do her statistics homework. If the mean is 38 minutes and the standard deviation is 3, calculate Jolie's z score. Once calculated, interpret your findings in terms of Jolie's performance.

Using size as the independent variable and cost as the

Using "size" as the independent variable and "cost" as the dependent variable, draw a scatter plot. b. Does it appear from inspection that there is a relationship between the variables? Why or why not? c. Calculate the l ...

Onenbspstudy based on responses 1014nbsprandomly

One study, based on responses 1,014 randomly selected teenagers, concluded that 39% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half of a ...

250 -300 wordsexplain the history behind the black soldier

250 -300 words Explain the history behind the Black Soldier of the Civil War In this forum look beyond the book for information on specific units, soldiers and even the reasons for why Lincoln allowed the African America ...

1 what is the minimum reliability coefficient that

1. What is the minimum reliability coefficient that researchers consider acceptable? Why do researchers use this minimum criterion for reliability? 2. For what kind of measure is it appropriate to examine test-retest rel ...

1 why do researchers use factor analysis2 imagine that you

1. Why do researchers use factor analysis? 2. Imagine that you conducted a factor analysis on a set of variables that were uncorrelated with one another. How many factors would you expect to find? Why?

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen