Answer:
B. Yes, the proportion of girls is significantly different from 0.5
Step-by-step explanation:
Given that a clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 340 babies wereborn, and 306 of them were girls.
Sample proportion = 
Std error of p = 
For sample size large, we find that t distribution almost coincides with z distribution
Hence 99% critical value = 2.58
Margin of error = 2.58*std error = 0.0420
Confidence interval = 
=
0.858<p<0.942
Yes, this method is effective becuse lower bound itself is 0.858 i.e. there is 85.8%chance for getting girls in birth
B. Yes, the proportion of girls is significantly different from 0.5
Answer:
15 units = h
Step-by-step explanation:
formula to find the volume is:
V = (l·w·h) ÷ 3
675 = (9)(15)h ÷ 3
675 = 135h ÷ 3
multiply each side by 3 to get:
2025 = 135h
2025/135 = h
15 = h
The total height of the building in the picture has been shown as
x + x + 6
That is, the first two storys have been shown as x feet each and the total height is 26 feet.
That means the two x are actually 20 feet, (if you deduct the 6 feet given)
Total height = x + x + 6
26 = x + x + 6
26 = 2x + 6
Subtract 6 from both sides of the equation
26 - 6 = 2x + 6 - 6
20 = 2x
Divide both sides of the equation by 2 and you now have,
20/2 = 2x/2
10 = x
Therefore, te height of each story is 10 feet!
<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em>
<em>H</em><em>ope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>you</em><em>.</em><em>.</em><em>.</em>
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