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Chapter 9: Q. 7 (page 537)

In a population of fish, approximately42% are female. A test is conducted to see if, in fact, the proportion is less. State the null and alternative hypotheses.

Short Answer

Expert verified

The required value are

H0:p=0.42Ha:p<0.42

Step by step solution

01

Given information

Females account for around 42% of a fish population. A test is to see if the proportion is indeed lower.

02

The null and alternative hypotheses are stated.

The null hypothesis H6 can be stated as shown below:

H0:p鈮�0.42

That mean, the proportion of female fish is more than 42%.

And, the alternative hypothesis Ha can be stated as shown below:

Ha:p<0.42

That mean, the proportion of female fish is no more than 42%.

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Most popular questions from this chapter

A medical trial is conducted to test whether or not a new medicine reduces cholesterol by25%.State the null and alternative hypotheses.

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Draw the graph of a two-tailed test.

"Blowing Bubbles," by Sondra Prull

Studying stats just made me tense,

I had to find some sane defense.

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Takes my troubles to the sky.

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Bubble therapy is the best.

The label said each time I blew

The average number of bubbles would be at least 22.

I blew and blew and this I found

From64blows, they all are round!

But the number of bubbles in64blows

Varied widely, this I know.

20per blow became the mean

They deviated by 6, and not16.

From counting bubbles, I sure did relax

But now I give to you your task.

Was22a reasonable guess?

Find the answer and pass this test!
See all solutions

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