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Chapter 9: Q. 33 (page 538)
The probability of winning the grand prize at a particular carnival game is Is the outcome of winning very likely or very unlikely?
The outcome of winning the grand prize at the game is very unlikely.
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A Nissan Motor Corporation advertisement read, 鈥淭he average man鈥檚 I.Q. is The average brown trout鈥檚 . So why can鈥檛 man catch brown trout?鈥� Suppose you believe that the brown trout鈥檚 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.
"Phillip鈥檚 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, 鈥淣o way!鈥�
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.
It鈥檚 all just for fun.
C鈥檓on 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, 鈥淚 think it鈥檚 much less.
We must do a hypothesis test.
And if you are right,
I won鈥檛 put up a fight.
But, if not, then my case will rest.鈥�
We proceeded to call fifty guys
To see whose prediction would fly.
Nineteen of the fifty
Said piercing was nifty
And earrings they鈥檇 occasionally buy.
Then there鈥檚 the other thirty-one,
Who said they鈥檇 never have this done.
So now this poem鈥檚 finished.
Will his hopes be diminished,
Or will my nephew have his fun?
We want to test whether the mean height of eighth graders is inches. State the null and alternative hypotheses. Fill in the correct symbol for the null and alternative hypotheses.
a.
b.
If the alternative hypothesis has a not equals ( 鈮� ) symbol, you know to use which type of test?
La Leche League International reports that the mean age of weaning a child from breastfeeding is age four to five worldwide. In America, most nursing mothers wean their children much earlier. Suppose a random survey is conducted of U.S. mothers who recently weaned their children. The mean weaning age was nine monthsrole="math" localid="1649394170256" with a standard deviation of months. Conduct a hypothesis test to determine if the mean weaning age in the U.S. is less than four years old.
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