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Sphinxa [80]
3 years ago
6

Which technique for gathering data (observational study or experiment) do you think was used in the following studies?(a) The Co

lorado Division of Wildlife netted and released 774 fish at Quincy Reservoir. There were 219 perch, 315 blue gill, 83 pike, and 157 rainbow trout.-This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.-This is an experiment because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.-This is an experiment because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.-This is an observational study because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.(b) The Colorado Division of Wildlife caught 41 bighorn sheep on Mt. Evans and gave each one an injection to prevent heartworm. A year later, 38 of these sheep did not have heartworm, while the other three did.-This is an observational study because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.-This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.-This is an experiment because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.-This is an experiment because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.(c) The Colorado Division of Wildlife imposed special fishing regulations on the Deckers section of the South Platte River. All trout under 15 inches had to be released. A study of trout before and after the regulation went into effect showed that the average length of a trout increased by 4.2 inches after the new regulation.-This is an experiment because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.-This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.-This is an experiment because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.-This is an observational study because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.(d) An ecology class used binoculars to watch 23 turtles at Lowell Ponds. It was found that 18 were box turtles and 5 were snapping turtles.-This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.-This is an observational study because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.-This is an experiment because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.-This is an experiment because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.
Mathematics
1 answer:
miv72 [106K]3 years ago
6 0

Answer:

For question a, the correct option is: This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.

For question b, the correct option is: This is an experiment because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.

For question c, the correct option is: This is an experiment because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured.

For question d, the correct option is: This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured.

Step-by-step explanation: To give us a background on why the options above were chosen, let us see the difference between Observational study and Experimental study.

In an observational study, the researcher draws inferences from an independent variable that is not under his/her control. While in an experimental study, there in an intervention and the effects of the intervention are studied.

Therefore, in the questions a to d above, all we need to do is identity which variables were influenced and which were merely observed.

For question a, the variables were only observed.

For question b, the variables were influenced.

For question c, the variables were also influenced.

For question d, the variables were merely observed.

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Answer:

B 137.32 cm³

Step-by-step explanation:

The original volume is

V = pi r^2 h

V = pi (3)^2 ( 12)

V =108 pi cm^2 = 339.12

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5 0
3 years ago
If 541 people use the swimming pool and children pay 1.75 dollars and adults pay 2.25 and in total earned was 1041.25 how many c
Zina [86]

Answer:

352 children

Step-by-step explanation:

Solve algebraically using a system of equations

Assign variables

let "a" be the number of adults

let "c" be the number of children    <-- We want to find this

a + c = 541             Equation for number of people

2.25a + 1.75c = 1041.25           Equation for money

<u>Rearrange the equation for people</u>. Isolate the variable you don't want to find.

a = 541 - c

<u>Substitute</u> "541 - c", replacing "a", in the equation for money

2.25a + 1.75c = 1041.25              

2.25(541 - c) + 1.75c = 1041.25               Distribute over brackets

1217.25 - 2.25c + 1.75c = 1041.25               Collect like terms

1217.25 - 0.5c = 1041.25                   Simplified equation

<u>Start isolating "c".</u> Move anything that's not "c" to the right side. Move numbers in reverse BEDMAS order. That means we will add/subtract before dividng/multiplying. When moving a number, do its reverse operation to the entire equation.

1217.25 - 0.5c = 1041.25      Do the reverse of positive 1217.25

1217.25 - 1217.25 - 0.5c = 1041.25 - 1217.25    Subtract 1217.25 on both sides  

-0.5c = -176               Do the reverse of multiplying by -0.5

-0.5c/-0.5 = -176/-0.5               Divide both sides by -0.5

c = 352                Number of children

Therefore, there were 352 children in the pool.

5 0
3 years ago
6TH grade math please help AP EX
hjlf

Answer:

I think the 1st one would be 10...

Step-by-step explanation:

Because 12-2=10 and 18-8=10.

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3 years ago
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