3 years ago

Select the correct answer.

Mathematics

1 answer:

yuradex [85]3 years ago

7 0

Answer:

awser 29

Step-by-step explanation:

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poll finds that 54% of the 600 people polled favor the incumbent. Shortly after the poll is taken, it is disclosed that he had a

Paha777 [63]

Answer: A. z = -2.57

Step-by-step explanation:

Let p be the population proportion of people polled favor the incumbent.

As per given , we have

$H_0: p=0.54\\\ H_a: p$

Sample size : n= 1030

sample proportion : $\hat{p}=0.50$

Test statistic for proportion : $z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

$z=\dfrac{0.50-0.54}{\sqrt{\dfrac{0.54(1-0.54)}{1030}}}\\\\= \dfrac{-0.04}{\sqrt{\dfrac{0.2484}{1030}}}\\\\=\dfrac{-0.04}{0.015529488}\approx-2.57$

Hence, the test statistic is z = -2.57 .

Thus , the correct answer is A. z = -2.57 .

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3 years ago

What is an equation of the line that passes through the point (3,-1) and is perpendicular to the equation y=-3x+2

Alex17521 [72]

If it is perpendicular then the slope of it will be:

$-3 \times x = -1\\\\x = \frac{1}{3}$

y = 1/3 x + b

-1 = (1/3)(3) + b

-1 = 1 + b

b = -2

The equation is:

$y = \frac{1}{3}x - 2$

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4 years ago

Michelle has a piece of yarn measuring 7 yards. How many 1-inch strips can be cut from the yarn?

White raven [17]

Answer:

Step-by-step explanation:

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3 years ago

Rita ran 5 miles in 48 minutes what was her time per mile

Free_Kalibri [48]

9.60 minutes per mile

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3 years ago

Read 2 more answers

What is the slope intercept for that has the point (2,2) and is parallel to y=x+4?

gulaghasi [49]

The new line will have the same slope as the old one.
y = x + 4
y = x + b is the new line
We solve for b by using (2,2)
When x = 2
y = 2

2 = 2 + b
b = 0
Therefore the new line is
y = x

8 0

4 years ago