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3 years ago

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In a community of 1000 people, what is the (annual) probability of 8 births? What is the probability of 8 deaths? What is the pr

obability of 13 births? 13 deaths? (Round your answers to four decimal places.)

1 answer:

GaryK [48]3 years ago

3 0

I don’t know sorryyyy Answer:

Step-by-step explanation:

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HELP ASPAP!!!!! WILL MARK BRAINIEST standard deviation

Umnica [9.8K]

Answer:

The standard deviation of the given data is 11.34.

Step-by-step explanation:

We have to find the standard deviation for the given data;

Grade on No. of students

test (X) with that score (f) $X \times f$ $( X - \bar X)^{2}$ $f \times ( X - \bar X)^{2}$

50 1 50 1073.218 1073.2176

57 2 114 663.578 1327.1552

60 4 240 518.018 2072.0704

65 3 195 315.418 946.2528

72 3 216 115.778 347.3328

75 12 900 60.218 722.6112

77 10 770 33.178 331.776

81 6 486 3.098 18.5856

83 6 498 0.058 0.3456

88 9 792 27.458 247.1184

90 12 1080 52.418 629.0112

92 12 1104 85.378 1024.5312

95 2 190 149.818 299.6352

99 4 396 263.738 1054.9504

100 <u> 5 </u> <u> 500 </u> 297.218 <u> 1486.088 </u>

Total <u> 91 </u> <u> 7531 </u> <u> 11580.68 </u>

Firstly, the mean of the above data is given by;

Mean, $\bar X$ = $\frac{\sum X \times f}{\sum f}$

= $\frac{7531}{91}$ = 82.76

Now, the standard deviation of the data is given by;

Standard deviation, S.D. = $\sqrt{\frac{\sum f(X-\bar X)^{2} }{\sum f-1}}$

= $\sqrt{\frac{11580.68}{91-1}}$

= 11.34

Hence, the standard deviation of the given data is 11.34.

5 0

2 years ago

Find the value of given expression<br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B31%20-%20%28%20-%205%29%7D%20" id="TexF

Neko [114]

31-(-5) = 155
the square root of 155 is 12.45

4 0

2 years ago

Read 2 more answers

Solve for x: |2x 6| − 4 = 20 (1 point) select one:

Irina18 [472]

A. x = 9 and x = 11 is the answer you are looking for

Hope I helped you ^^

4 0

2 years ago

write and solve the differential equation that models the following statment. "the rate if change of W with respect to x is prop

Vaselesa [24]

Answer:

$\int k(x + 18)dx = \int kx + 18k dx$ = $k\frac{x^{2} }{2}$ + $18kx$ + C where C is the constant of integration.

Step-by-step explanation:

i)it is given that the rate of change of W with respect to x is proportional to

x + 18. Therefore $\frac{dW}{dx}$ = k(x + 18) where k is a constant.

ii) Therefore $\int k(x + 18)dx = \int kx + 18k dx$ = $k\frac{x^{2} }{2}$ + $18kx$ + C where C is the constant of integration.

iii) the complete solution can only be found if we know the constant of proportion and also the constant of integration.

4 0

3 years ago

If the 3 cans cost 0.78 how much will 2 cans cost

ivann1987 [24]

Answer:

.52

Step-by-step explanation:

math ting

6 0

2 years ago