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Leviafan [203]
2 years ago
8

Please help with this question

Mathematics
1 answer:
Assoli18 [71]2 years ago
5 0

Answer:

75°

Step-by-step explanation:

Please see attached picture for full solution.

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A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We are interested in determinin
riadik2000 [5.3K]

Answer:

Option b - not significantly greater than 75%.

Step-by-step explanation:

A random sample of 100 people was taken i.e. n=100

Eighty of the people in the sample favored Candidate i.e. x=80

We have used single sample proportion test,

p=\frac{x}{n}

p=\frac{80}{100}

p=0.8

Now we define hypothesis,

Null hypothesis H_0 : candidate A is significantly greater than 75%.

Alternative hypothesis H_1 : candidate A is not significantly greater than 75%.

Level of significance \alpha=0.05

Applying test statistic Z -proportion,

Z=\frac{\widehat{p}-p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}

Where, \widehat{p}=80\%=0.80 and p=75%=0.75

Substitute the values,

Z=\frac{0.80-0.75}{\sqrt{\frac{0.75(1-0.75)}{100}}}

Z=\frac{0.80-0.75}{\sqrt{\frac{0.1875}{100}}}

Z=\frac{0.05}{0.0433}

Z=1.1547

The p-value is

P(Z>1.1547)=1-P(Z

P(Z>1.1547)=1-0.8789

P(Z>1.1547)=0.1241

Now, the p-value is greater than the 0.05.

So we fail to reject the null hypothesis and conclude that the A is not significantly greater than 75%.

Therefore, Option b is correct.

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15 - x = 2(x + 3)
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Answer:

84 degree

Step-by-step explanation:

the new supposed line is parallel to the given parallel lines..

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he has driven 15 miles so far which is three-fifths of the way home what is the total length of his drive
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Answer:

**The total length of his drive is 25 miles

Step-by-step explanation:

15 = 3/5

therefore 5 miles is 1/5 of the way home

15+5+5=25

8 0
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Is 3.232323232323....... a rational number? *
uysha [10]

Answer:

Step-by-step explanation:

A. Yes it repeats

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