Statistics

Carol has data on the causes of violent outbursts among kindergarten children. She used a "shot-gun" approach to hypothesis testing by asking the computer to produce p-values for 300 quickly chosen hypothesis tests. She shared her glee with fellow researchers, noting that she had found 15 statistically significant results. She went so far as to brag that she had made some discoveries that defied all previously held notions about the wild behavior of this population of terrifying tots. She used the .05 level of significance. Explain why she actually found nothing.

1. 👍 0
2. 👎 0
3. 👁 63
1. .05 * 300 = 15

This means you would expect 15 tests to be significant solely by chance.

1. 👍 0
2. 👎 0
posted by PsyDAG

Similar Questions

1. Statistics

Carol has data on the causes of violent outbursts among kindergarten children. She used a "shot-gun" approach to hypothesis testing by asking the computer to produce p-values for 300 quickly chosen hypothesis tests. She shared her

asked by Kevin on April 30, 2014
2. Preschool/Kindergarten

Which of the following is a reason why kindergarten was started in the United States? a. Kindergarten was designed to be affordable to most people. b. Kindergarten was designed to be universally available for all. c. Kindergarten

asked by anonymos on November 7, 2014
3. Stat

Kindergarten children have heights that are approximately distributed normal. A random sample of size 20 is taken and the mean x and the standard deviation s are calculated ( x = 40 inches and s = 3). a. Is there sufficient

asked by MK on August 5, 2014
4. statistics

Kindergarten children have heights that are approximately distributed normal. A random sample of size 20 is taken and the mean x and the standard deviation s are calculated ( x = 40 inches and s = 3). a. Is there sufficient

asked by T on August 3, 2014

In a 1995 Corporation for Public Broadcasting poll of TV viewership, one question was, “A recent study by a psychology professor at a leading university concluded that the amount of violence children see on television has an

asked by dolphino on November 17, 2006
6. psy

)]}> Many are concerned that playing violent games may lead to violent behavior. However, statistics show that violent behavior in children has declined significantly at the same time that video game sales have skyrocketed. It is

asked by Cat on September 25, 2010
7. Statistics

The heights of kindergarten children are normally distributed with a mean of 39.5 inches and a standard deviation of 3.8 inches. In a kindergarten class of 23 children, what is the probability that their mean height is between

asked by Jose Garcia on December 7, 2016
8. physics

You are designing a game for small children and want to see if the ball’s maximum speed is sufficient to require the use of goggles. In your game, a 15.0-g ball is to be shot from a spring gun whose spring has a force constant

asked by bill on March 4, 2010
9. physics

4. A gun’s bullet was launched horizontally with a speed 600m/s. It fell to the ground 300m away from the gun. a. How long was the bullets flight? b. At what height was the gun’s barrel at the moment of the shot? 5.

asked by brian on February 9, 2016
10. teacher aide

When are children first developmentally ready to begin a formal study of history? A Kindergarten B Middle grades C Junior high D High school I need help I think its A Kindergarten can someone tell me if I have it right. Thanks

asked by Bree on April 21, 2011

More Similar Questions