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zimovet [89]
3 years ago
15

A decade-old study found that the proportion of high school seniors who felt that "getting rich" was an important personal goal

was 72% . Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis and the alternative hypothesis that we would use for this test.
Mathematics
1 answer:
juin [17]3 years ago
5 0

Answer: H_0:p\leq0.72

H_a:p\neq0.72

Step-by-step explanation:

Given :  A decade-old study found that the proportion of high school seniors who felt that "getting rich" was an important personal goal was 72% .

Let 'p' be the new proportion of high school seniors who felt that "getting rich" was an important personal goal .

Claim : p\neq0.72

We know that the null hypothesis has equal sign.

Therefore , the null hypothesis for the given situation will be opposite to the given claim will be :-

H_0:p=0.72

And the alternative hypothesis must be :-

H_a:p\neq0.72

Hence,  the null hypothesis and the alternative hypothesis that we would use for this test :

H_0:p\leq0.72

H_a:p\neq0.72

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nlexa [21]
Hi!

So really focus on the fact that he started at $230, and then added an amount of money which we'll call x, which made his total equal $599. 

Take the parts I put in bold, and write the equation.
$230 + x = $599

Now we need to find x. 

Whatever we do to the equation, we do it to both sides. 
Our goal is to isolate x on one side. 

Subtract 230 from both sides. 
$230 - $230 + x = $599 - $230
x = $369

The answer is A. $230 + x = $599 x = $369

Hope this helps! :)
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