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ziro4ka [17]
3 years ago
14

Which part of a fraction tells how many parts it takes to make a whole? (Numerator of denominator?)

Mathematics
2 answers:
solmaris [256]3 years ago
4 0
The denominator will tell how many parts it takes to make a whole


Katyanochek1 [597]3 years ago
3 0
The denominator tells you how many parts it takes to make a whole. The numerator tells you how many parts is "shaded" out of the whole. I hope this helps.
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Step-by-step explanation:

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Terry’s 7th grade class started out with 40 students. Over the last 4 months the class has seen a 30% decrease in students. How
Rashid [163]

Answer:

28 students

Step-by-step explanation:

30% is equal to .3

40 x .3 equals 12

This means the class has lost 12 students.

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Another way:

Because the class has lost 30% of it's students, you know that the class is 70% of it's original capacity.

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4 0
3 years ago
A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's comple
krek1111 [17]

Answer:

Reject <em>H</em>₀.

Step-by-step explanation:

In this case, we need to test whether the average student spent less than the recommended amount of time doing homework in statistics.

The provided data is:

S = {20, 29, 28, 22, 26, 22, 22, 18, 23, 21, 20, 27}

Compute the sample mean:

\bar x=\frac{1}{n}\sum X=\frac{1}{12}\cdot [20+29+...+27]=23.167

The population standard deviation is <em>σ</em> = 7.

The hypothesis for the test is:

<em>H</em>₀: The average student does not spent less than the recommended amount of time doing homework, i.e. <em>μ</em> ≥ 24.

<em>Hₐ</em>: The average student spent less than the recommended amount of time doing homework, i.e. <em>μ</em> < 24.

(A)

Compute the standardized test statistic value as follows:

z=\frac{\bar x-\mu}{\sigma/\sqrt{n}}

  =\frac{23.167-24}{7/\sqrt{12}}\\\\=-0.412

Thus, the standardized test statistic value is -0.412.

(B)

The significance level of the test is:

<em>α</em> = 0.07

The critical value of <em>z</em> is:

<em>z</em>₀.₀₇ = -1.476

The rejection region is:

(-∞, -0.1476)

(C)

Compute the <em>p</em>-value as follows:

p-value=P(Z

*Use a <em>z</em>-table.

Thus, the <em>p</em>-value is 0.34.

(D)

Since, <em>p</em>-value = 0.34 > <em>α</em> = 0.07, the null hypothesis was failed to be rejected at 7% level of significance.

Thus, the correct option is (A).

4 0
3 years ago
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