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Studentka2010 [4]
3 years ago
12

A large random sample of American students in seventh grade showed that 20%20\% 20% 20, percent of them were reading below grade

level.
Based on this data, which of the following conclusions are valid?
A.20% of all American students in seventh grade were reading below grade level.
B. 20% of this sample was reading below grade level, but we cannot conclude anything about the population.
Mathematics
2 answers:
WITCHER [35]3 years ago
7 0

Answer:

The answer is A i must took the test

Step-by-step explanation:

deff fn [24]3 years ago
6 0

Answer:

the answer is A

Step-by-step explanation:

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The U.S. Bureau of Labor Statistics releases figures on the number of full-time wage and salary workers with flexible schedules.
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Answer:

61.70% probability that he or she will be between 23 and 52 years of age

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The probability that we find a value X between c and d is given by the following formula.

P(c \leq X \leq d) = \frac{d - c}{b - a}

The numbers of full-time wage and salary workers in each age category are almost uniformly distributed by age, with ages ranging from 18 to 65 years.

This means that a = 18, b = 65. So

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P(23 \leq X \leq 52) = \frac{52 - 23}{65 - 18} = 0.6170

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4 years ago
Does anyone know what the solution to −1.3≥2.9−0.6r is??
vovikov84 [41]

Answer:

yes its r<u>></u>7

Step-by-step explanation:

-1.3<u>></u>2.9-0.6r   subtract 2.9 on both sides and do KCC keep change change

-2.9 -2.9

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-4.2<u>></u>0.6r

________   divide by -0.6 on both sides to get

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7<u><</u>r or r<u>></u>7 either way is fine

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Answer:

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Step-by-step explanation:

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what this mean is that the add up to equal 180 degrees

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