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rodikova [14]
3 years ago
7

The computer is expected to play an increasingly important role in crime control in the years to come. In 1983 the FBI had a non

computerized Ident system containing the records of thousands of persons across the country. A random sample of 500 records shows that only 70% of these records include information on the disposition of the case. This is unfortunate, since approximately 1/3 of all cases are eventually dismissed. If the dismissal is not part of the record, then an innocent person could be stigmatized.
a) Assume that a new computerized criminal history system is developed and implemented. A random sample of size 500 is selected from the cases recorded in the new system. It is found that 410 of these include information on the disposition of the case. Estimate the proportion of cases in the new system that include information on the disposition of the case.

b) Estimate the difference in proportions between the old Ident system and the new computerized system. (Subtract in the order New-Ident)

c) Find a 95% confidence interval on the difference in proportions.

d) It is safe to say that the new system is superior to Ident in the sense that it contains more "disposition of case" information? Explain, based on the confidence interval of part (c).
Mathematics
1 answer:
sergeinik [125]3 years ago
7 0
The third one C! It describes the passage
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As shown in the figure

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Distance from the base to the point where the person is standing=30 m

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Now the person cast the shadow of length x m.

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∠C is common.

So by AA similarity ΔABC and ΔEDC are similar.

As we know when triangles are similar their sides are proportional.

AB/AD =BC/DC

Let DC=x meter

⇒\frac{10}{x}=\frac{30+x}{x}

⇒5=\frac{30+x}{x}[/tex]

⇒5x=30+x

⇒4x = 30

⇒ x=30/4

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So length of shadow=7.5 meter

2. volume of a sphere of radius r is v (r) =\frac{4}{3}π r^{3}

\frac{\mathrm{d} }{\mathrm{d} r}V=4/3π×3r^2

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             =1  [ incomplete question but you have written few words ]

4 0
3 years ago
A cylinder has a base radius of 5 inches and a height of 6 inches. What is its volume in cubic inches, to the nearest tenths pla
yuradex [85]

Answer:

V≈471.24

or to the nearest tenth is

471.2

7 0
2 years ago
Read 2 more answers
Please help me i make my questions worth more, and give brainliest....
REY [17]

Step-by-step explanation:

(a-b)^2=a^2-2ab+b^2

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Ans C

X^2-10X+25

7 0
3 years ago
Desperate<br> please Hurry<br> Question Down Below
aliina [53]

Answer:

4

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8 0
2 years ago
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7,24,25. 7 , 23,24 7, 25,26 <br> Which of the following will form a right triangle
Andru [333]
We know that
In <span>a right triangle
c</span>²=a²+b²
where
a and b are the legs of triangle 
c is the hypotenuse of the triangle
so

case 1)7,24,25
25²=7²+24²
25²-----> 625
7²+24²----> 625
625 is equal to 625----------> <span>form a right triangle
</span>
case 2) 7,23,24
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24²------> 576
7²+23²-----> 578
576 is not 578-------------> not form a right triangle

case 3) 7,25,26
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26²-----> 676
7²+25²-----> 674
676 is not 674----->  not form a right triangle

the answer is
7,24,25 form a right triangle



8 0
3 years ago
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