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spayn [35]
3 years ago
7

There are 12 boys and 16 girls in a classroom. which represents the simplified ratio of girls to students in the classroom?

Mathematics
2 answers:
Nikolay [14]3 years ago
6 0

Answer:

Ratio of girls to STUDENTS is 4 to 7

Step-by-step explanation:

The information given is that there are  12 boys and 16 girls in the classroom. The question is not about the ratio of girls to boys but about the ratio of girls to STUDENTS. You need to add the amount of girls plus the amount of boys to get the total amount of students.

Girls to Students

16  to 28 (12 +16)

Simplify 16:28 by dividing each number by 4

Answer is 4:7

Papessa [141]3 years ago
3 0
The unsimplified version is 12:16
you have to find the highest common factor in them
in this case it would be 4
divide both numbers by 4 
3:4

hope this helps you
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Step-by-step explanation:

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Answer:

Mean = (2.2 + 2.4 + 2.5 + 2.5 + 2.6 + 2.7)/6 = 2.48

Standard deviation = √(summation(x - mean)²/n

n = 6

Summation(x - mean)² = (2.2 - 2.48)^2 + (2.4 - 2.48)^2 + (2.5 - 2.48)^2 + (2.5 - 2.48)^2 + (2.6 - 2.48)^2 + (2.7 - 2.48)^2 = 0.1484

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Part B

Confidence interval is written as sample mean ± margin of error

Margin of error = z × s/√n

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Confidence interval is 2.48 ± 0.22

Part C

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

H0: µ = 2.3

For the alternative hypothesis,

H1: µ > 2.3

This is a right tailed test

Since the number of samples is small and no population standard deviation is given, the distribution is a student's t.

Since n = 6

Degrees of freedom, df = n - 1 = 6 - 1 = 5

t = (x - µ)/(s/√n)

Where

x = sample mean = 2.48

µ = population mean = 2.3

s = samples standard deviation = 0.16

t = (2.48 - 2.3)/(0.16/√6) = 2.76

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p = 0.02

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Step-by-step explanation:

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