(Answered) An article describes a study that appeared in the journal

Economics

An article describes a study that appeared in the journal Pediatrics. In this study, researchers looked at records of 2500 children who were participating in a long term health study. They found that 10% of these children had attention disorders at age 7 and that hours of television watched at age 1 and age 3 associated with an increased risk of having an attention disorder at age 7. Is this an observational study or an experiment? Why?

View complete question

Business Economics, Economics

Category:- Business Economics
Reference No.:- M93116969
Price:- $10

Verified Expert

Priced at $20 Now at $10, Verified Solution

Have any Question?Write your Review or question?

Related Questions in Business Economics

A survey of 1272 pre-owned vehicle shoppers found that 8

A survey of 1272 pre-owned vehicle shoppers found that 8% bought the extended warranties. What is the population and what is the sample?

Some residents of the village of taugswater have proposed

Some residents of the village of Taugswater have proposed purchasing logging permits relating to a nearby wilderness area. The majority of residents agree that the purchase of permits, to be set aside and not used, is th ...

Model this situation using a game tablehawk and dove two

Model this situation using a game table. Hawk and Dove: Two animals are fighting over some prey. Each can be passive or aggressive. Each prefers to be aggressive if the other is passive, and passive if the other is aggre ...

An instrument is made up of 3 parts an upper part a middle

An instrument is made up of 3 parts: an upper part, a middle part and a lower part. the instrument is then assembled. 6% of the upper parts are defective, 3% of the middle parts are defective, and 2% of the lower parts a ...

A simple random sample of n shown on right observations

A simple random sample of n (shown on right) observations from a normally distributed population with a known standard deviation of σ (shown on right), compute the margin of error with (1 - α)100% confidence (α shown on ...

How over the past 3 years has cash and futures oil price

How over the past 3 years, has Cash and Futures Oil Price volatility affected the Australian equity market.

A random sample of 15 drivers from montana and finds that

A random sample of 15 drivers from Montana and finds that they drive an average of 12,895 miles annually with a standard deviation of 3801 miles. Find the 96% confidence interval for the population mean of miles driven. ...

Question consider an exchange economy with two prominent

Question: Consider an exchange economy with two prominent leaders: Romney and Bernanke. Each get utility from destroying jobs, J; and from power, P. Their utility functions are: URomney = ln(P) + 2 ln(J) UBernanke = 2ln( ...

A random sample of 19 college mens basketball games during

A random sample of 19 college? men's basketball games during the last season had an average attendance of 5,046 with a sample standard deviation of 1,753. a. Construct a 99?% confidence interval to estimate the average a ...

One of the authors received a credit card bill for 2772 but

One of the authors received a credit card bill for 2,772, but included a charge of 1,762 that was not valid. Find the values of the absolute and relative errors.

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

Recent Questions

Ask Business Economics Expert