2 years ago

Help please I’ll mark you

Mathematics

1 answer:

Margaret [11]2 years ago

7 0

Answer:

I'm not really sure but I think it's 160°

Step-by-step explanation:

ST is equal to 30° x 2 so 60°

Now, you'll do 60+140 which equals to 200°

A full circle is 360° so, 360 - 200 = 160°

Ps: I'm not sure but I think this is correct.

I hope this helps :)

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Vesnalui [34]

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-X-2y=-14
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podryga [215]

Answer:

The answer is "0.3206".

Step-by-step explanation:

$H_0: p_1 = p_2\\\\H_a: p_1 \neq p_2\\\\\hat{p_1} = \frac{X_1}{N_1} = \frac{53}{400} = 0.1325\\\\\hat{p_1}= \frac{X_2}{N_2} = \frac{78}{500}= 0.156\\\\\hat{p} = \frac{(X_1 + X_2)}{(N_1 + N_2)} = \frac{(53+78)}{(400+500)} = 0.1456$

Testing statistic:

$z = \frac{(\hat{p_1}- \hat{p_2})}{\sqrt{(\hat{p} \times (1-\hat{p}) \times (\frac{1}{N_1} + \frac{1}{N_2}))}}$

$=\frac{(0.1325-0.156)}{\sqrt{(0.1456\times (1-0.1456)\times (\frac{1}{400} + \frac{1}{500}))}}\\\\ = -0.99$

Calculating the P-value Approach

$\text{P-value}= 0.3206$

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