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3 years ago

The difference between an observational study and an experiment is that

Mathematics

2 answers:

serious [3.7K]3 years ago

7 0

<span>in an experiment cause and effect is analyzed, and in an observational study, it is not </span>

skad [1K]3 years ago

6 0

Answer: In an observational study, researchers do not control treatment, and in an experiment they do .

Step-by-step explanation:

Observational study is the study where the researcher observes the subjects and measures variables, but does not influence the population where as in an experiment the experimenter has control on the independent variable to see the effect on the dependent variable.

So the correct difference between an observational study and an experiment is that "in an observational study, researchers do not control treatment, and in an experiment they do."

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(a) Tom says that 1/5 + 7/20 = 8/25

mezya [45]

numerator = top part of the fraction

denominator = bottom part of the fraction

* means multiply

you can only add the numerator when the denominator is the same

cant add the denominator

denominator has to be the same

1/5 = 4/20

4/20 + 7/20 = 11/20

1 7/8 = 15/8

3/4 ÷ 15/8 =

3/4 * 8/15 =

24/60 = divide both top and bottom by 12 =

2/5

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3 years ago

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A rectangular pool is surrounded by a walk 4 meters wide. The pool is 5 meters longer than its width. If the total area of the p

larisa [96]

Answer:

45 and 55

Step-by-step explanation:

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3 years ago

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Gnoma [55]

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In a survey of 2,800 people who owned a certain type of car, 840 said they would buy that type of car again. What percent of the

cluponka [151]

Answer:

30% of people surveyed were satisfied with the car.

Step-by-step explanation:

We are given:

Total participants in survey= 2800

People satisfied with car = 840

We need to find percent of the people surveyed were satisfied with the car.

The formula used is: $\frac{People \ satisfied \ with \ car}{Total \ participants \ in \ survey} \times 100$

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So, 30% of people surveyed were satisfied with the car.

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2 years ago

I need help pleassseee

Lubov Fominskaja [6]

Answer:

The length of the radius is 3cm.

Step-by-step explanation:

Given that a circle is inscribed in a square. The side of the circle touches the side of the square which is the diameter. So the diameter of circle is 6cm, in order to find it's radius, you have to duvide it by 2 :

$radius = diameter \div 2$

$radius = 6 \div 2$

$radius = 3cm$

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3 years ago

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