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Tresset [83]
4 years ago
15

Li designed a survey to determine how comfortable students at her middle school are with fractions. There are 600 students in he

r middle school. The students are equally distributed among grade levels. She selected a sample of 28 students in her first-period class. Which best explains Li’s sample?
Mathematics
2 answers:
Dmitry_Shevchenko [17]4 years ago
4 0

The correct answer to this is:

Nonrandom and biased

 

<span>The method of Li’s sampling has a tendency that some elements or portion in the population has no chance of selection. Further, it was not stated which portion of the population she obtained the sample thus we cannot accurately determine the probability of selection. This kind of sampling results in a bias. A biased sampling is a type of nonrandom sampling. </span>

Oxana [17]4 years ago
4 0

Answer:

C for edge users

Step-by-step explanation:

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Answer:

a + b ≥ 40

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Step-by-step explanation:

We are told she would like to have at least 40 cupcakes and cookies combined.

If a is number of cupcakes and b is number of cookies, then this inequality is;

a + b ≥ 40

Secondly, we are told she would like to have at most 5 more cupcakes than cookies.

Thus, the inequality is;

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Lastly, we are told that cupcakes sell for $2.50 and cookies for $1.50

Thus, the inequality is;

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Finally, the 3 inequalities are;

a + b ≥ 40

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