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 -value.
"Phillipโs Wish," by Suzanne Osorio
My nephew likes to play
Chasing the girls makes his day.
He asked his mother
If it is okay
To get his ear pierced.
She said, โNo way!โ
To poke a hole through your ear,
Is not what I want for you, dear.
He argued his point quite well,
Says even my macho pal, Mel,
Has gotten this done.
Itโs all just for fun.
Cโmon please, mom, please, what the hell.
Again Phillip complained to his mother,
Saying half his friends (including their brothers)
Are piercing their ears
And they have no fears
He wants to be like the others.
She said, โI think itโs much less.
We must do a hypothesis test.
And if you are right,
I wonโt put up a fight.
But, if not, then my case will rest.โ
We proceeded to call fifty guys
To see whose prediction would fly.
Nineteen of the fifty
Said piercing was nifty
And earrings theyโd occasionally buy.
Then thereโs the other thirty-one,
Who said theyโd never have this done.
So now this poemโs finished.
Will his hopes be diminished,
Or will my nephew have his fun?
"Blowing Bubbles," by Sondra Prull
Studying stats just made me tense,
I had to find some sane defense.
Some light and lifting simple play
To float my math anxiety away.
Blowing bubbles lifts me high
Takes my troubles to the sky.
POIK! They're gone, with all my stress
Bubble therapy is the best.
The label said each time I blew
The average number of bubbles would be at least .
I blew and blew and this I found
Fromblows, they all are round!
But the number of bubbles inblows
Varied widely, this I know.
per blow became the mean
They deviated by , and not.
From counting bubbles, I sure did relax
But now I give to you your task.
Wasa reasonable guess?
Find the answer and pass this test!
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?
"The Craven," by Mark Salangsang
Once upon a morning dreary
In stats class I was weak and weary.
Pondering over last nightโs homework
Whose answers were now on the board
This I did and nothing more.
While I nodded nearly napping
Suddenly, there came a tapping.
As someone gently rapping,
Rapping my head as I snore.
Quoth the teacher, โSleep no more.โ
โIn every class you fall asleep,โ
The teacher said, his voice was deep.
โSo a tally Iโve begun to keep
Of every class you nap and snore.
The percentage being forty-four.โ
โMy dear teacher I must confess,
While sleeping is what I do best.
The percentage, I think, must be less,
A percentage less than forty-four.โ
This I said and nothing more.
โWeโll see,โ he said and walked away,
And fifty classes from that day
He counted till the month of May
The classes in which I napped and snored.
The number he found was twenty-four.
At a significance level of ,
Please tell me am I still alive?
Or did my grade just take a dive
Plunging down beneath the floor?
Upon thee I hereby implore.
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