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3 years ago

Can anyone help and explain the answer ?

Mathematics

1 answer:

Readme [11.4K]3 years ago

3 0

Answer:

X=65

Step-by-step explanation:

The picture is not very good, but i guess tht x is angle on the section. Right?

If it is true we have that:

The angle formed by two intersection chode is:

X=1/2(30+100)

X=130/2

X=65

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The interval is $-0.0037 < p_1-p_2$

Step-by-step explanation:

From the question we are told that

The first sample size is $n _1 = 1068000$

The first sample proportion is $\r p_1 = 0.089$

The second sample size is $n_2 = 1476000$

The second sample proportion is $\r p_2 = 0.092$

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Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table

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Generally the 95% confidence interval is mathematically represented as

$(\r p_1 - \r p_2 ) -z_c \sqrt{ \frac{\r p_1 \r q_1 }{n_1} + \frac{\r p_2 \r q_2 }{n_2}} < (p_1 - p_2 ) < (\r p_1 - \r p_2 ) +z_c \sqrt{ \frac{\r p_1 \r q_1 }{n_1} + \frac{\r p_2 \r q_2 }{n_2}}$

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and $\r q_2$ is mathematically evaluated as $\r q_2 = (1 - \r p_2) = 1- 0.092 = 0.908$

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$-0.0037 < p_1-p_2$

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