1 In this experiment we compared a treatment condition against a control. Each subject is administered a treatment of some kind. 2 Describe why that control was chosen and not another one. A control treatment is the same exact treatment as given in the active experiment by lacking the variable tested. The control treatment is the.
Full Answer
What treatment is being compared to the control in an experiment?
The treatment group (also called the experimental group) receives the treatment whose effect the researcher is interested in. The control group receives either no treatment, a standard treatment whose effect is already known, or a placebo (a fake treatment).Jul 3, 2020
What treatment is being compared to the control in the experiment Chapter 12?
What treatment is being compared to the control in the experiment? The treated glioblastoma cells were cultured in the presence of an inhibitor from umbilical cord stem cells, but the control cells were cultured without the inhibitor.
Which statement best describes the difference in the distribution of cells in the treated sample compared to the control sample?
Which statement best describes the difference(s) in the distribution of cells in the treated sample compared to the control sample? The treated cells are mostly in the G1 phase (region A), but in the control sample, there are peaks of cells in both G1 and G2 (region C).
Which is the best explanation of how the activity of a cell is controlled quizlet?
Which is the best explanation of how the activities of a cell are controlled? The activities of a cell are under the control of the cell's DNA, which contains the instructions for the cell.
What is the function of the centrosomes?
The centrosome is the primary microtubule-organizing centre (MTOC) in animal cells, and so it regulates cell motility, adhesion and polarity in interphase, and facilitates the organization of the spindle poles during mitosis.
What do centrosomes look like?
Centrosomes are made up of two, barrel-shaped clusters of microtubules called “centrioles” and a complex of proteins that help additional microtubules to form. This complex is also known as the microtubule-organizing center (MTOC), since it helps organize the spindle fibers during mitosis.Feb 10, 2021
What variable did the researchers intentionally vary in the experiment?
What variable did the researchers intentionally vary in the experiment, and what are the units for this variable? (This is the independent variable.)
Which statement best explains the change in the male steelhead trout population?
Which statement best explains the change in the male steelhead trout population? Longer males are able to outcompete shorter males for access to females.
Which of the following best explains the difference in water potential between certain solutions and the grapes?
Based on Table 1, which of the following best explains the difference in water potential between certain solutions and the grapes? - NaCl and tap water have a lower water potential because these two solutions caused the grape to gain water.
Which is the best explanation of how the activity of a cell is controlled?
Which is the best explanation of how the activities of a cell are controlled? a. The activities of a cell are controlled by the environment in which the cell develops. External signals direct every action of the cell.
What is the disease that occurs with the loss of control of the cell cycle?
Cancer is a disease that can occur when control of the cell cycle is lost.
What happens when a positive regulator is over activated?
Similarly, positive regulators of cell division can lead to cancer if they are too active. In most cases, these changes in activity are due to mutations in the genes that encode cell cycle regulator proteins.
Answer
B. The treated glioblastoma cells were cultured in the presence of an inhibitor from umbilical cord stem cells, but the control cells were cultured without the inhibitor.
New questions in Biology
Suppose you've already decided on a weight for each trait. These are loaded into an array called weights in the cell below. weights.item (0) is the wei …
Answer
The correct answer is: the treated glioblastoma cells were cultured in the presence of an inhibitor from umbilical cord stem cells, but the control cells were cultured without the inhibitor .
New questions in Biology
Some of the cell membrane functions are similar to the ________ of the body.
What is the first value of a control mean?
The first value is the number of pairs for which the control mean and the treatment mean were equal under H1. The second value is the number of pairs for which the means were different under H1.
What is the power of a test?
The notion of the power of a test is well-defined for individual tests. Power is the probability of rejecting a false null hypothesis. However, this definition does not extend easily when there are a number of simultaneous tests. To understand the problem, consider an experiment with four groups labeled, C, A, B, and D. Suppose C is the control group. There are three paired comparisons in this experiment: A-C, B-C, and D-C. How do we define power for these three tests? One approach would be to calculate the power of each of the three tests, ignoring the other two. However, this ignores the interdependence among the three tests. Other definitions of the power of the set of tests might be the probability of detecting at least one of the differing pairs, exactly one of the differing pairs, at least two of the differing pairs, and so on. As the number of pairs increases, the number of possible definitions of power also increases. The two definitions that we emphasize in PASS were recommended by Ramsey (1978). They are
What is computer simulation?
Computer simulation allows us to estimate the power and significance level that is actually achieved by a test procedure in situations that are not mathematically tractable. Computer simulation was once limited to mainframe computers. But, in recent years, as computer speeds have increased, simulation studies can be completed on desktop and laptop computers in a reasonable period of time.
How to simulate random samples in PASS?
The first method generates the random variates directly, one value at a time. The second method generates a large pool (over 10,000) of random values and then draws the random numbers from this pool. This second method can cut the running time of the simulation by 70%! As mentioned above, the second method begins by generating a large pool of random numbers from the specified distributions. Each of these pools is evaluated to determine if its mean is within a small relative tolerance (0.0001) of the target mean. If the actual mean is not within the tolerance of the target mean, individual members of the population are replaced with new random numbers if the new random number moves the mean towards its target. Only a few hundred such swaps are required to bring the actual mean to within tolerance of the target mean. This population is then sampled with replacement using the uniform distribution. We have found that this method works well as long as the size of the pool is the maximum of twice the number of simulated samples desired and 10,000.
What is the significance test in Dunnett's analysis?
For each treatment and control pair, the significance test is calculated by rejecting the null hypothesis of mean equality if
What happens if you enter a non zero seed?
If you enter a non-zero random seed, the same random sequence will be generated with each run and the output will not change. This is often used to replicate previous results.
What is the alpha of a test?
Alpha is the probability of rejecting H0 when H0 is true. It is a characteristic of an individual test. This is the average alpha value over all of the tests in the family.
