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steposvetlana [31]
4 years ago
10

Identify the type of observational study (cross-sectional, retrospective, or prospective) described below. A research company us

es a device to record the viewing habits of about 2500 households, and the data collected over the past 2 years will be used to determine whether the proportion of households tuned to a particular children's program increased. Which type of observational study is described in the problem statement?
A. A prospective study
B. A retrospective study
C. A cross-sectional study
Mathematics
1 answer:
finlep [7]4 years ago
8 0

Answer:

B

Step-by-step explanation:

The retrospective or historic cohort story, is a longitudinal cohort story that considers a particular set of individuals that share the same exposure factor to ascertain its influence in the developments of an occurrence, which are compared with the other set or cohort which were not exposed to the same factors.

Retrospective studies have existed about the same time as prospective studies, hence their names.

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Answer:

axy under

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3 years ago
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Ava has two frogs. This is 1/3 the number of frogs that Heather has. How many frogs does Heather have?
lesya692 [45]

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2x3=6 and that the number of frogs heather has or you can do this Ava has 2 frogs and heather has 1/3 more then take the 2 and add it to the 1 and that makes three. then take both of the threes and add them together and you then have the same number of 6

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Please help, been stuck on this for ages!
marishachu [46]

Answer:

\boxed {192 cm^{2}}

Step-by-step explanation:

<u>Find the volume of separate cuboids</u> :

<u>Volume (top cuboid)</u> :

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⇒ V = 12 x 8

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<u>Volume (lower cuboid)</u> :

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2 years ago
Help Would Be Greatly Appreciated :)
aliina [53]

Answer:

n is y=\frac{1}{2}x+b, p is y=\frac{1}{2}x-5, and r has infinitely many different lines that have this property.

Step-by-step explanation:

If two lines have no solutions, that means that they are parallel. The slopes of two lines are the same if they are parallel. So n's slope is \frac{1}{2}. The y-intercept can be anything except -5, or +b. If two lines have infinitely many solutions, those two lines are exactly the same. So p is just m. If two lines have one and only one solution, that just means the slopes and y-intercepts are different. Since we don't know anything else about line r, we an't model an equation for it.

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3 years ago
The age of cars in the staff parking lot of a suburban college is uniformly distributed from six months (0.5 years) to 9.5 years
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5.5 is the answer stay safe
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