What is 4 is to 3 as x is to 20

Mathematics

1 answer:

Reptile [31]3 years ago

6 0

Answer:

Step-by-step explanation:

Better write, "Solve '4 is to 3 as x is to 20' for x."

x = 80/3

Writing out this equation of ratios, we get:

4 x

------ = -----

3 20

Cross multiplication here yields:

3x = 80, and then x = 80/3.

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Pavlova-9 [17]

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4 0

3 years ago

Large samples of women and men are obtained, and the hemoglobin level is measured in each subject. Here is the 95% confidence

qwelly [4]

Answer:

a) Because the confidence interval does not include 0 it appears that there

is a significant difference between the mean level of hemoglobin in women and the mean level of hemoglobin in men.

b)There is 95% confidence that the interval from −1.76 g/dL<μ1−μ2<−1.62 g/dL actually contains the value of the difference between the two population means μ1−μ2

c) 1.62 < μ1−μ2< 1.76

Step-by-step explanation:

a) What does the confidence interval suggest about equality of the mean hemoglobin level in women and the mean hemoglobin level in men?

Given:

95% confidence interval for the difference between the two population means:

−1.76g/dL< μ1−μ2 < −1.62g/dL

population 1 = measures from women

population 2 = measures from men

Solution:

The given confidence interval has upper and lower bound of 1-62 and -1.76. This confidence interval does not contain 0. This shows that the population means difference is not likely to be 0. Thus the confidence interval implies that the mean hemoglobin level in women and the mean hemoglobin level in men is not equal and that the women are likely to have less hemoglobin than men. This depicts that there is significant difference between mean hemoglobin level in women and the mean hemoglobin level in men.

There is 95% confidence that the interval −1.76 g/dL<μ1−μ2<−1.62 g/dL actually contains the value of the difference between the two population means μ1−μ2.

If we interchange men and women then