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2 years ago

Please help me with this math problem!! NO LINKS!!! Will mark brainliest!! :)

Mathematics

1 answer:

mart [117]2 years ago

5 0

Answer:

m∠B would be 45°

Step-by-step explanation:

Since m∠C is a right angle (90°) and m ∠B is half of a right angle, it would be 45°.

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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.

7 0

3 years ago

Name a 2 digit odd number that is prime. Name a 2 digit odd number that is composite .

salantis [7]

11 for the first one and 12 for the second one

8 0

2 years ago

(This is very confusing)Tania planted five seeds in her garden nadia planted times as many seeds as Tania how many seeds did nad

Fittoniya [83]

There's a number missing from the question. It's supposed to be right before the word "times".
If it were there, the answer would be (5 times that number).
The way the question is written, without that number, there's no answer.

5 0

3 years ago

Read 2 more answers

What is the surface area of a cylinder with base radius 3 and height 6?

Nikolay [14]

Answer:

I think the answer is 169.65

6 0

3 years ago

Read 2 more answers

PLSS HELP ME ITS TIMED ILL MARK BRAINLIEST

Fed [463]

Answer:

56 times 52 times 76 divide by 4 = ? times 3 dont forget to add cm cubed at the end

Step-by-step explanation:

8 0

3 years ago