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3 years ago

I’m having doubts about my homework, am I correct? Explain :)

Mathematics

2 answers:

Volgvan3 years ago

5 0

Answer:

All Correct, 3rd question is 30

Step-by-step explanation:

parallelogram area: base*height

rectangle area: length*width

Arturiano [62]3 years ago

4 0

Answer:

Step-by-step explanation:

1 & 2 look good

3) 5 *6 = 30

4) looks good

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A past survey of students taking a standardized test revealed that % of the students were planning on studying engineering in c

Angelina_Jolie [31]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The 95% confidence interval is $-0.00870$

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 1068000$

The first proportion $\r p_1 = 0.084$

The second sample size is $n_2 = 1476000$

The second proportion is $\r p_2 = 0.092$

Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha = (100 - 95)\%$

$\alpha = 0.05$

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

$Z_{\frac{\alpha }{2} } =z_c= 1.96$

Now using the formula from the question to construct the 95% confidence interval we have

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

Here $\r q_1 = 1 - \r p_1$

=> $\r q_1 = 1 - 0.084$

=> $\r q = 0.916$

and

$\r q_2 = 1 - \r p_2$

=> $\r q_2 = 1 - 0.092$

=> $\r q_2 = 0.908$

$(0.084 - 0.092 )- (1.96)* \sqrt{ \frac{0.092* 0.916 }{1068000} + \frac{0.084* 0.908 }{1476000} }$

$-0.00870$

3 0

3 years ago

a card is chosen at random from a deck of 52 cards it is then replaced and a second card is chosen what is the probability of ge

castortr0y [4]

There are 4 jacks and 4 eights so with replacement:

P(Jand8)=(1/13)^2=1/169

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Answer:

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Step-by-step explanation:

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Answer:

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Answer

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