Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

a) Categorize according to most descriptive or definitive category of research strategies (i.e., experiments, quasi-experiments, surveys, case-control studies, cohort studies, matched design, naturalistic observations, retrospective vs. prospective studies, longitudinal vs. cross-sectional studies, time-series, single-subject studies).

b) Recognize the features of the study which prompted your classification.

c) Recognize the IV, DV, and other variables, if appropriate.

d) Recognize and describe potential threats (up to 3) to internal validity.

e) Recognize and describe potential threats (up to 3) to external validity.

f) Recognize strategies that were employed to control for nuisance variables and minimize threats to valid inference making.

g) What additional strategies (up to 3) you would suggest that might raise the validity of the findings?

Please keep your answers brief.

Employment records were employed to recognize 100 men who had worked for the company in Los Angeles that manufactured chemicals employed as fire retardants. A second group of men, n=90, was identified who worked for two other companies in Los Angeles and had no exposure to chemicals. Evidence of primary thyroid dysfunction was found in four of exposed men; none of unexposed men showed evidence of thyroid dysfunction.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921072

Have any Question? 


Related Questions in Statistics and Probability

Please read below i need help right away i have posed this

Please read below. I need help right away. I have posed this problem in three different ways an the only consistant answer I get is instructing me to go pay money to another site. PLEASE HELP! Inferential Research and St ...

Ship collisions are rare in the houston ship channel the

Ship Collisions are rare in the Houston Ship Channel. The mean is .8 collisions in 6 months What is the probability of no collisions in 6 months. What is the probability of one collision in a year?

1 why can it be argued that the formula for calculating r

1. Why can it be argued that the formula for calculating r should be named the Edgeworth, rather than the Pearson, correlation coefficient? 2. Why may we not interpret or discuss a correlation coefficient that is not sta ...

The time spentin days waiting for a kidney transplant for

The time spent(in days) waiting for a kidney transplant for people ages 35-49 can be approximated by the normal distribution, as shown in the figure to the right. (a) What waiting time represents the 99th percentile? (b) ...

Assume that population means are to be estimated from the

Assume that population means are to be estimated from the samples described. Use the sample results to approximate the margin of error and 95% confidence interval. Sample size equals=6464, sample mean equals=8282, sample ...

The following data represents a random sample of number of

The following data represents a random sample of number of shares of a pharmaceutical company's stock traded for 20 days in 2000. 3.99 8.91 10.41 7.53 13.85 5.3 9.7 8.95 12.11 13.26 4.25 8.55 11.6 6.76 27.55 7.72 10.15 4 ...

A laboratory in california is interested in finding the

A laboratory in California is interested in finding the mean chloride level for a healthy resident in the state. A random sample of 50 healthy residents has a mean chloride level of 100 mEq/L. If it is known that the chl ...

Box a has 2 green and 5 blue marbles in it box b has 9

Box A has 2 green and 5 blue marbles in it. Box B has 9 green and 6 blue marbles in it. A marble is drawn from Box A, transferred to Box B, and then a marble is drawn from Box B. What is the probability a blue marble was ...

1 what are the most important threats to validity that

1. What are the most important threats to validity that occur in quasi experimental research designs when the research is conducted over a period of time? What techniques can be used to minimize these potential interpret ...

Data interpretationresearch reportyour taskwrite a report

Data Interpretation Research Report Your task: Write a report on the statistical relationship that you find between the stock price of the company that you have been assigned and the following three variables: the FTSE, ...

  • 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