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olya-2409 [2.1K]
3 years ago
11

A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval for the proportion of homeles

s persons who are veterans.
Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
4 0

Answer:

[0.184, 0.266]

Step-by-step explanation:

Given:

Number of survey n =280

Number of veterans = 63

Confidence interval = 90%

Computation:

Probability of veterans = 63/280

Probability of veterans =0.225

a=0.1

Z(0.05) = 1.645 (from distribution table)

Confidence interval = 90%

So,

p ± Z*√[p(1-p)/n]

0.225 ± 1.645√(0.225(1-0.225)/280)

[0.184, 0.266]

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Which set of graphs can be used to find the solution set to 3 log2(x + 4) < 6?
alexgriva [62]

Answer:

It's graph D

Step-by-step explanation:

5 0
3 years ago
The maximum number of marks attainable at a mathematics competition is 60 suppose you obtained 40 marks your brother obtained 46
mixer [17]

Answer:

You = bronze

Your brother = silver

Your sister = gold

Step-by-step explanation:

Your marks: 40/60

Your brother's marks: 46/60

Your sister's marks: 49/60

You can simplify the fractions, but you don't have to:

40/60 = 2/3

46/60 = 23/30

49/60 = 49/60

Now, divide each of the numerators by the denominators (turn the fraction into a decimal).

2/3 = 0.6667

23/30 = 0.7666667

49/60 = 0.8166667

(Note that these are all approximations as the real answers go on forever)

Lastly, multiply them all by 100 to get the percent.

0.6667 x 100 = 66.67% - bronze

0.76667 x 100 = 76.667% - silver

0.816667 x 100 = 81.6667% - gold

3 0
2 years ago
Collin is making a bulletin board and note center. He is using square cork tiles and square dry-erase tiles. One of every 3 squa
Lisa [10]
Well 12 divided by 3 is 4 so there will be 4 cork squares.
5 0
3 years ago
Determine the value of a in the figure shown
galina1969 [7]

Answer:

d

Step-by-step explanation:

180-149= 31.

31+ 122= 153

180-153= 27

a= 27

3 0
3 years ago
Find the distance between two points ( -1,1) and (2,-4)
sladkih [1.3K]

Answer:

The distance between two points ( -1,1) and (2,-4) is:

d=\sqrt{34}  or d = 5.8 units.

Step-by-step explanation:

Given the points

  • (-1, 1)
  • (2, -4)

Finding the distance between (-1, 1) and (2, -4) using the formula

d=\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}

substitute (x₁, y₁) =  (-1, 1)   and  (x₂, y₂) = (2, -4)

   =\sqrt{\left(2-\left(-1\right)\right)^2+\left(-4-1\right)^2}

   =\sqrt{\left(2+1\right)^2+\left(-4-1\right)^2}

   =\sqrt{3^2+5^2}

   =\sqrt{9+25}

   =\sqrt{34}  units

or

d = 5.8 units

Therefore, the distance between two points ( -1,1) and (2,-4) is:

d=\sqrt{34}  or d = 5.8 units.

3 0
3 years ago
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