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Liula [17]
3 years ago
15

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 512 babies were born, an

d 256 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective? ___ ____
Mathematics
1 answer:
vfiekz [6]3 years ago
3 0
Ok so what we need to do is:

<span>p = 312/624 = 0.500 best estimate
mean is p N = (0.500) 624 = 312
standard deviation is sqrt[Np(1-p)] = 12.5
 If we approximate the binomial by a Normal we would be using
 mu = 312, s.d = 12.5
 and the 99% C.I. is
mean +- 2.57 s.d
 we convert the mean to p by dividing by 624 so corresponding C.I. for p would be 0.500+ - (2.57)(12.5)/624 or 0.500+- 0.051
</span>I hope this is useful for you

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Answer:

0

Step-by-step explanation:

3x = 2

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12/3 - 4

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Which set of ordered pairs represents a function?
KATRIN_1 [288]

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{(3, -1), (7, 1), (-6, -1), (9, 1), (2, -1)}

Step-by-step explanation:

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3 years ago
What is the surface area for this design?
Umnica [9.8K]

Answer:

Surface Area = 157 in^2

Step-by-step explanation:

Surface area is the area of each side added together.

Front = Trapezoid =  <u>b1 + b2</u> * h          <u> 5 + 9 </u>  *  5   = 27.5              

                                        2                        2                              

Back = Trapezoid =  <u>b1 + b2</u> * h           <u> 5 + 9 </u>  *  5   = 27.5               27.5

                                        2                        2                                        27.5

Right = Rectangle = l * w                      6.4 * 5 =  32                           32

Left = Rectangle = l * w                           5 * 5 =  25                           25

Bottom = Rectangle = l * w                     9 * 5 =  45                           45

Top = Rectangle = l * w                          5 * 5 =  25                          <u> 25     </u>

                                                                                                             157 in^2

8 0
3 years ago
Are the triangles congruent ?
scoundrel [369]
I’m pretty sure there not but I might be wrong
6 0
3 years ago
I NEED HELP ON #10!!!!!!!!!! please
postnew [5]

Answer:

the distance is 8

Step-by-step explanation:

8 0
2 years ago
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