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Sati [7]
2 years ago
15

A middle school contains sixth, seventh, and eighth graders. Each grade level contains approximately the same number of students

. The principal wants to find the answer to a survey question affecting each student in the school. He asks a sample group “What time do you get up in the morning?” Which of these characteristics define the best sample?
one student chosen at random from each grade level
an equal number of students chosen at random from each grade level
the first 10 students from each grade level to arrive at school in the morning
all students arriving on one bus
Social Studies
1 answer:
Ksju [112]2 years ago
5 0

A middle school contains sixth, seventh, and eighth graders, the characteristics define the best sample an equal number of students chosen at random from each grade level. Option C. This is further explained below.

<h3>What is a sample?</h3>

Generally, A sample is a smaller group of data chosen or selected by a researcher from a larger population using a pre-defined selection process.

In conclusion, A middle school has sixth, seventh, and eighth graders; the features determine the optimal sample, which consists of an equal number of students drawn at random from each grade level.

Read more about Probability

brainly.com/question/14950837

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Kahlil walks for 4 hours at the rate of x miles an hour. He stops an hour for lunch and then returns on a bus to his starting po
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Answer:

6⅓ hours (or 6 hours and 20 minutes)

Explanation:

For Khalil on foot;

Let;

Speed = x miles/hour

Time = 4 hours

Distance = D (miles)

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x = D/4

D = 4x miles

For Khalil on the bus;

The bus travels at 6 times his walking rate, therefore;

Speed = 6x miles/hour

Bus follows a route that is twice as long, therefore;

Distance = 2D (miles)

Time = T (hours)

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Remember, from above, D = 4x

Therefore,

6x = 2(4x)/T

6x × T = 8x

T = 8x/6x

T = 4/3 hours = 1⅓ hours

Therefore time spent by khalil on the bus = 1⅓ hours or 1 hour, 20 minutes.

Total hours spent on entire trip = hours khalil spent walking + lunch hour + hours khalil spent on the bus

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4 years ago
What highly populated city of Europe lies on the prime median
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There are 2 forms of this type of control: the first one has to do with the internalization of values using socialization, in other words, teaching an individual what is socially acceptable in the community. The second one has to do with establishing sanctions to prevent behaviors that have a deviation from the norm.

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