Researchers are investigating the effect of pH level in water on the breeding habits of the moon jellyfish. As part of a laboratory experiment, they will randomly assign one of three treatments, low pH, medium pH, or high pH, to the water in the tanks that hold the jellyfish.Which of the following is the best reason for the random assignment of a treatment level to an experimental unit?
Answers
Answer:
A. Randomization tends to minimize the effects of uncontrolled variables, such as water temperature, so that such factors are not confounded with the treatment effects.
Step-by-step explanation:
---Researchers are investigating the effect of pH level in water on the breeding habits of the moon jellyfish. As part of a laboratory experiment, they will randomly assign one of three treatments, low pH, medium pH, or high pH, to the water in the tanks that hold the jellyfish.
Which of the following is the best reason for the random assignment of a treatment level to an experimental unit?
A. Randomization tends to minimize the effects of uncontrolled variables, such as water temperature, so that such factors are not confounded with the treatment effects.
B. Randomization will make up for improper experimental design, data collection, and analysis.
C. Randomization makes the analysis easier since the data can be entered into the computer in any order.
D. Randomization is required by statistical consultants before they will analyze the experiment.
E. Randomization means that the experiment would not need to be replicated---
Randomization is used to ensure that the results of a trial or an experiment are actually because if the treatment or hypothesis we are trying, instead of any other external factor that we can not control, or because it just always happens that way, if all of the jellyfish are affected or not in the same way, then the Ph had little to nothing to do with it, and if only one group of them is affected we can re-try the experiment to see if the difference in the Ph had anything to do with the change.
Answer:
A.Randomization tends to minimize the effects of uncontrolled variables, such as water temperature, so that such factors are not confounded with the treatment effects.
Step-by-step explanation:
Related Questions
Suppose the correlation coefficient between a predictor variable (a person’s height, measured in centimeters) and a response variable (a person’s weight, measured in kilograms) is 0.72.Suppose that we change the units used to measure height from centimeters to inches and the units used to measure weight from kilograms to pounds, and then we recompute the correlation coefficient. Which of the following would be true?Select one:a. The new correlation coefficient should be the same: R = 0.72.b. The new correlation coefficient should be R = 0.72 × (2.54/2.2) ≈ 0.83.c. The new correlation coefficient should be R = 0.72 × (2.2/2.54) ≈ 0.62.d. The new correlation coefficient should be something other than the options given here.
If m∠1 = 3x, m∠3 = 2x + 20 and m∠5 = 30, what is the value of x?
The table represents a linear function. What is the slope of the function?
The width of a picture frame is x inches and the length is x+3 inches, what is the value of x if the area must be 40 square inches
Answers
A is 3/10 , if we multiply top and bottom by 4 we get 12/40 , which is not equivalent to 12/20.
B is 5:3 , it cannot be equivalent to 12/20.
C is 120 to 200 , if we divide both numerator and denominator by 10 we get 12/20, So option C is correct.
D is 60/80 , if we divide both numerator and denominator by 5, we get 12/16 , which is not equivalent to 12/20.
Hence option C is the correct answer.
12 x 10 : 20 x 10
120 : 200 (Answer C)
Answers
1 pint = 2 cups
1/2 of a pint = 1 cup
2 + 1 = 3
Your answer is 3 cups
Hope this helps :)
Answers
Answer:2
Step-by-step explanation:
Greatest factor of 6w^4 10a^4
6w^4=2x3xw^4
10a^4=2x5xa^4
There greatest common factor is 2
Answers
Answer:
The required standard form is 38,200,000.
Step-by-step explanation:
Consider the provided number.
The calculator shows the number 3.82e+7
E notation is the same as the scientific notation the only difference is the letter e is substituted for "× 10^".
Here, the e+7 means
Thus the provided number can be written as:
Now expand it, just move the decimal point over 7 place to right as shown:
Hence, the required standard form is 38,200,000.
basically move the decimal place 7 placs to right so it would be aprox
38200000.0
Answers
The best sentence that describes the interval [-2, 1] implies that the function is increasing on the interval [-2, 1].
What is a cubic polynomial function?
A cubic polynomial function is a polynomial function whose power is at 3°. It has a general formula f(x) = ax³ + bx² + cx + d.
where;
- a, b, c, and d are real numbers, hence a ≠ 0.
If the data given in the table is represented on the graph, we can see that the data value proceeds in increasing order from negative to positive, as such:
The best sentence that describes the interval [-2, 1] implies that the function is increasing on the interval [-2, 1].
Learn more about cubic polynomial function here:
#SPJ2
Answer:
The function is increasing on the interval [-2,1]
Step-by-step explanation:
3,7,11,15,19
Answers
Answer:
Arithmetic Sequence:
d=4
Step-by-step explanation:
This is an arithmetic sequence since there is a common difference between each term. In this case, adding 4 o the previous term in the sequence gives the next term. In other words, aₙ=a₁+d(n-1)