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Dmitry [639]
4 years ago
15

Is the test below left-, right-, or two-tailed? H0:p=0.39, Ha:p≠0.39 Select the correct answer below: The hypothesis test is two

-tailed. The hypothesis test is left-tailed. The hypothesis test is right-tailed.
Mathematics
1 answer:
lesya692 [45]4 years ago
7 0

Answer:

The hypothesis test is a two-tail test

Step-by-step explanation:

The test hypothesis:

Null hypothesis                  H₀       p = 0,39         or   p  =  p₀

Where p₀ is a nominal proportion (established proportion) and

Alternate hypothesis         Hₐ       p  ≠  0,39        or  p ≠  p₀

Is a two-tail test, (≠) means different, we have to understand that different implies bigger and smaller than something.

For a test to be one tail-test, it is necessary an evaluation only in one sense in relation to the pattern ( in this case the proportion )

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umka21 [38]

Answer:

2x^3+6x^2-4x-12

Step-by-step explanation:

3 0
3 years ago
A newspaper stand sold 1,000 copies of the city newspaper for $1,600 write and solve an equation to find the price of one copy
Vsevolod [243]

Answer: \$1.6

Step-by-step explanation:

Let be "x" the price in dollars of one copy of the city newspaper.

You need to analize the information provided in the exercise:

1. The total number of copies of the city newspaper sold in the newspaper stand is:

Total\ copies=1,000

2. The amount of money earned by selling 1,000 copies of  the city  newspaper is:

Total\ earned=\$1,600

Then, you can determine that the value of "x" can be found with:

x=\frac{Total\ earned}{Total\ copies}

3. Finally, substituting values, you get:

x=\frac{\$1,600}{1,000}\\\\x=\$1.6

7 0
3 years ago
HELPPPPPPPPPP :))))))))))
Naya [18.7K]

Answer:

C

<em>Hope that helps!</em>

Step-by-step explanation:

4 0
3 years ago
A publisher reports that 45% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is
nexus9112 [7]

Answer:

z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933  

p_v =2*P(z  

Step-by-step explanation:

Information given

n=370 represent the sample selected

\hat p=0.4 estimated proportion of  readers owned a laptop

p_o=0.45 is the value that we want to test

z would represent the statistic

p_v represent the p value

Creating the hypothesis

We need to conduct a hypothesis in order to test if the true proportion of readers owned a laptop is different from 0.45, the system of hypothesis are:  

Null hypothesis:p=0.45  

Alternative hypothesis:p \neq 0.45  

The statistic is:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing we got:

z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933  

Calculating the p value  

We have a bilateral test so then the p value would be:

p_v =2*P(z  

8 0
3 years ago
Nine less than twice a number is thirtyone. what is the answer
pshichka [43]
31+9=40
40/2=20
The solution is 20
8 0
4 years ago
Read 2 more answers
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