All categories

3 years ago

Please help im on a test!!! Brainiest will be marked!!!

Mathematics

2 answers:

vredina [299]3 years ago

8 0

Answer: 15 square feet

Step-by-step explanation:

Multiply 3 x 1.25. This gives you the area of the rectangle which is 3.75 in. It is a scale model where every in is equal to 4ft. Multiply 3.75 by 4. 15ft is the answer.

laila [671]3 years ago

4 0

Answer:

answer is in the sbs explanation

Step-by-step explanation:

1.5625

You might be interested in

Calculate<br>a) 20% of £150<br>b) 15% of 80 kg<br>c) 85% of 2500 m

kotykmax [81]

Answer:

A) 30

B) 12 kg

C) 2,125 m

Step-by-step explanation:

8 0

3 years ago

Divide and simplify.

balandron [24]

The last one is the correct one.

8 0

3 years ago

I’m literally struggling like can someone hel me plz this is due tomorrow

KonstantinChe [14]

Check the picture below.

4 0

3 years ago

Helpppp me correct this pls :(

Anit [1.1K]

So basically you counting by 3

3 0

2 years ago

A diagnostic test for a certain disease is applied to n individuals known to not have the disease. Let X = the number among the

Anon25 [30]

Answer:

Part a

The maximum likelihood estimator of p, is the sample proportion, $\bar p=\frac{x}{n}$

And the proportion of the estimate at n=25 and x = 3 is 0.12.

Part b

The maximum likelihood estimate from part (a) is an unbiased estimator.

Part c

The maximum likelihood estimate of the probability is 0.5277.

Step-by-step explanation:

The likelihood function is, $L(p;x) =\frac{n!}{x!(n-x)!}p*(1- p)^{n-x}$

Applying log on both sides:

$\log L(p;x) =\log\frac{n!}{x!(n-x)!}+x\log p+(n-x)log(1-p)$

Find the differentiation of log L with respect to P and equate to zero to find the MLE for .

$\frac{d}{dp}\log L(p,x)=\frac{x}{p}-\frac{n-x}{1-p}\\\\=\frac{x}{p}-\frac{(n-x)}{1-p}\\\\=x(1-p)-(n-x)p=0\\=x-xp-np+xp=0\\=x-np=0\\=x=np\\=\bar p=\frac{x}{n}$

Calculate the estimate of the function if n=25 and x = 3.

$\bar p=\frac{x}{n}\\\\=\frac{3}{25}\\\\= 0.12
$

Hint for next step

The MLE for the population proportion is the sample proportion and there is a 0.12 proportion of estimate at n = 25 and x = 3

Consider

$E(\bar p)\\\\E(\bar p)=E(\frac{X}{n})\\\\=\frac{1}{n}E(X)\\\\=\frac{1}{n}(np)(since\, E(X)
=np)\\\\=p$

Since $E(\bar p)=p
$ , the maximum likelihood estimate from part (a) is an unbiased estimator.

Hint for next step

Based on the part (a) calculation, since it is proved that , the maximum likelihood estimate is unbiased estimator for population proportion

(c)

Calculate the maximum likelihood estimate of the probability $(1-p)^5$ .

By the Invariance property of MLE, to find the MLE of $(1-P)^5$ , the MLE of p can be used.

That is, the MLE of $(1-p)^5$ is $(1-\bar p)^5$

Therefore,

MLE of the probability,

$(1- p)^5 = (1-\bar P)^5\\\\=(1-\frac{3}{25})^5\\\\=(1-0.12)^5\\=(0.88)^5\\=0.5277$

7 0

3 years ago