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1 answer:
The number 72 should replace the question mark.
Step-by-step explanation:
Step 1:
First, we need to determine how the values inside the triangles were attained in terms of the outer values.
We get that summing the bottom values on the triangle and multiplying it with the value on top equals the value in the triangle.
For triangle 1,
For triangle 2,
For triangle 3,
Step 2:
By using the same method for the fourth triangle we have;
For triangle 4:
So the question mark equals 72.
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Answer:
2630 g
Step-by-step explanation:
From the given information:
Given that:
mean (μ) = 3750 g
Standard deviation (σ) = 500
Suppose the hospital officials demand special treatment with a percentage of lightest 3% (0.03) for newborn babies;
Then, the weight of birth that differentiates the babies that needed special treatment from those that do not can be computed as follows;
P(Z < z₁) = 0.03
Using the Excel Formula; =NORMSINV(0.03) = -1.88
z₁ = - 1.88
Using the test statistics z₁ formula:
By cross multiply, we have:
-1.88 × 500 = X - 3570
-940 = X - 3570
-X = -3570 + 940
-X = -2630
X = 2630 g
Hence, 2630 g is the required weight of birth that differentiates the babies that needed special treatment from those that do not