Answer:
B) 36 girls will choose the zoo
Step-by-step explanation:
The data from sample gathered is
Boys Girls
Zoo 15 8
Museum 10 12
Total 25 20
The question asks about what will the data for 90 girls and 78 boys will look like. We can use the data as proportion and make the expected value for the new data. There are 90 girls in the question and the sample is 20 girls, so it's 90/20= 4.5 times larger than the sample. The expected data will be:
Girls
Zoo 8 x 4.5 = 36
Museum 12 x 4.5 = 54
Total 20x 4.5 = 90
The number of boys is 78 while the sample is 25, the data will be
Boys
Zoo 15 x 78/25 = 46.8
Museum 10 x 78/25 = 31.2
Total 25x 78/25 = 78
The answer will be 36 girls will choose the zoo
Option D
The percentage increase of the area of the building space is 34 %
<em><u>Solution:</u></em>
A company is expanding its building area from 11,000 square feet to 14,740 square feet
To find: Percentage Increase
<em><u>The percent increase is given by formula:</u></em>
From given,
Initial value = 11000
Final value = 14740
<em><u>Substituting we get,</u></em>
Thus percentage increase of the area of the building space is 34 %
It is a right, isosceles triangle.
Since the formula for the area of a four sided figure is:
A=base*height
Rearrange the equation to solve for height:
h=A/b
63cm squared/7cm=9cm
height=9cm
x=9cm
Answer:
- 6.547
Step-by-step explanation:
Given that:
Sample size (n) = 1207
p = 0.85
p0 = 0.92
The test statistic :
Z = (p - p0) / √(p0(1 - p0) / n)
Z = (0.85 - 0.92) / √(0.92(1 - 0.85) / 1207)
Z = - 0.07 / √(0.92(0.15) / 1207)
Z = - 0.07 / √0.0001143
Z = - 0.07 / 0.0106926
Z = - 6.5465446
Z = - 6.547
