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3 years ago

Please please please help me

Mathematics

1 answer:

Kazeer [188]3 years ago

5 0

Answer:

2nd option

Step-by-step explanation:

Under a reflection in the x- axis

a point (x, y ) → (x, - y ) , then

P (- 8, 1 ) → P' (- 8, - 1 )

Q (- 6, - 8 ) → Q' (- 6, 8 )

R (4, - 3 ) → R' (4, 3 )

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2 years ago

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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

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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,

$p=\frac{x}{n}$

$p=\frac{80}{100}$

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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%.

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

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Step-by-step explanation:

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