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3 years ago

Need help I got not time to do all the work and is almost due

Mathematics

2 answers:

xxMikexx [17]3 years ago

8 0

Answer:

13-5=2m

8=2m

m=8÷2

hence m=4

Tatiana [17]3 years ago

8 0

Answer:

m = 4

Step-by-step explanation:

my work is included in the picture :)

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3 years ago

If your car goes 50 kilometers in 2 hours,what is its average speed

Georgia [21]

Answer:

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Step-by-step explanation:

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3 years ago

what is The ratio of boys to girls at the dance was 9 to 5. How many girls were at the dance if there were 85 girls at the dance

AleksandrR [38]

Answer: 153 boys

Step-by-step explanation:

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3 years ago

Read 2 more answers

Select one: A. 7 B. 0 (INCORRECT) C. (12,-5) D. (2,3) (INCORRECT)

Veronika [31]

I got A for the answer
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3 years ago

Read 2 more answers

(a) Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the prop

zalisa [80]

Answer:

(a) The sample sizes are 6787.

(b) The sample sizes are 6666.

Step-by-step explanation:

(a)

The information provided is:

Confidence level = 98%

MOE = 0.02

n₁ = n₂ = n

$\hat p_{1} = \hat p_{2} = \hat p = 0.50\ (\text{Assume})$

Compute the sample sizes as follows:

$MOE=z_{\alpha/2}\times\sqrt{\frac{2\times\hat p(1-\hat p)}{n}$

$n=\frac{2\times\hat p(1-\hat p)\times (z_{\alpha/2})^{2}}{MOE^{2}}$

$=\frac{2\times0.50(1-0.50)\times (2.33)^{2}}{0.02^{2}}\\\\=6786.125\\\\\approx 6787$

Thus, the sample sizes are 6787.

(b)

Now it is provided that:

$\hat p_{1}=0.45\\\hat p_{2}=0.58$

Compute the sample size as follows:

$MOE=z_{\alpha/2}\times\sqrt{\frac{\hat p_{1}(1-\hat p_{1})+\hat p_{2}(1-\hat p_{2})}{n}$

$n=\frac{(z_{\alpha/2})^{2}\times [\hat p_{1}(1-\hat p_{1})+\hat p_{2}(1-\hat p_{2})]}{MOE^{2}}$

$=\frac{2.33^{2}\times [0.45(1-0.45)+0.58(1-0.58)]}{0.02^{2}}\\\\=6665.331975\\\\\approx 6666$

Thus, the sample sizes are 6666.

7 0

2 years ago