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Chapter 9: Q. 9.5 (page 509)
Suppose the null hypothesis,, is: the blood cultures contain no traces of pathogen.State the Typeand Typeerrors.
Type one error is the blood cultures contain traces of pathogen opposite to the fact.
Type two error is the blood cultures contain no traces of pathogen opposite to the fact.
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Assume the -value is . What type of test is this? Draw the picture of the p-value.
"Dalmatian Darnation," by Kathy Sparling
A greedy dog breeder named Spreckles
Bred puppies with numerous freckles
The Dalmatians he sought
Possessed spot upon spot
The more spots, he thought, the more shekels.
His competitors did not agree
That freckles would increase the fee.
They said, “Spots are quite nice
But they don't affect price;
One should breed for improved pedigree.”
The breeders decided to prove
This strategy was a wrong move.
Breeding only for spots
Would wreak havoc, they thought.
His theory they want to disprove.
They proposed a contest to Spreckles
Comparing dog prices to freckles.
In records they looked up
One hundred one pups:
Dalmatians that fetched the most shekels.
They asked Mr. Spreckles to name
An average spot count he'd claim
To bring in big bucks.
Said Spreckles, “Well, shucks,
It's for one hundred one that I aim.”
Said an amateur statistician
Who wanted to help with this mission.
“Twenty-one for the sample
Standard deviation's ample:
They examined one hundred and one
Dalmatians that fetched a good sum.
They counted each spot,
Mark, freckle and dot
And tallied up every one.
Instead of one hundred one spots
They averaged ninety six dots
Can they muzzle Spreckles’
Obsession with freckles
Based on all the dog data they've got?
A sleeping bag is tested to withstand temperatures of. You think the bag cannot stand temperatures that low. State the Type I and Type II errors in complete sentences.
From generation to generation, the mean age when smokers first start to smoke varies. However , the standard deviation pf that age remains constant of around years . A survey of smokers of this generation was done to see if the mean starting age is at least . the sample mean was with a sample standard deviation ofdo the data support the claim at the level?
A Nissan Motor Corporation advertisement read, “The average man’s I.Q. is The average brown trout’s . So why can’t man catch brown trout?” Suppose you believe that the brown trout’s mean I.Q. is greater than four. You catch brown trout. A fish psychologist determines the I.Q.s as follows: . Conduct a hypothesis test of your belief.
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