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What is the difference between a null hypothesis and a research hypothesis?

The null hypothesis is the default hypothesis. It is the hypothesis that there is no difference between the control group and the treatment group. The research hypothesis proposes that there is a significant difference between the control group and the treatment group.


Which factor distinguishes the experimental group from the control group a conclusion a variable a hypothesis a theory?

The factor that distinguishes the experimental group from the control group is a variable. Specifically, it is the independent variable that is manipulated in the experimental group to observe its effect, while the control group remains unchanged to provide a baseline for comparison. A conclusion, hypothesis, and theory are related to the research process but do not serve this distinguishing purpose.


What must a scientists always be sure of when testing a hypothesis?

The conditions of what is called his control group.


How do scientists determine whether a hypothesis is correct?

Scientists determine whether a hypothesis is correct by performing experiments. They apply the hypothesized stimulus to one group of subjects and not to another group called the control group. If the experimental group is significantly different statistically from the control group the hypotheses is assumed correct. But, that isn't the end, if it's a significant finding other researchers try to duplicate the experiment. If they are unable to, it brings the hypothesis into question.


What is the common element of a well designed experiment?

The common element of a well-designed experiment is a clear research question or hypothesis, a control group for comparison, random assignment of participants to groups, and proper data collection and analysis techniques.


What is the test for whether a hypothesis is scientific?

A scientific hypothesis is testable, falsifiable, and based on observable evidence. It can be validated or invalidated through empirical evidence and experimentation. If a hypothesis meets these criteria, it is considered scientific.


How are hypothesis test?

By collecting data. Hypotheses are tested through experimentation, which can be manifest in an infinite amount of ways. The common ground in all hypothesis testing is that both a control (a group that is free of experimental manipulation in the studied variable), and an experimental group (a group with one experimental variable manipulated to test the effect of this variable) are needed to understand the question raised in the hypothesis.


What is the standard for comparison in an experiment called?

The standard for comparison in an experiment? da that's what they asked don't have to repet the question


What does a hypothesis become after it is tested and proven?

A hypothesis, or group of hypotheses, that is accepted as consistently valid is a theory. Either a hypothesis or a theory can be ultimately disproven. One definition of a theory is an accepted hypothesis.


What is a role of a control group?

In conducting a scientific experiment, a scientist should have a control group and an experiment/treatment group. The scientist proposes a null hypothesis (null because it is intended to be disproven). The scientist then treats the two groups identically except the treatment group receives the treatment and the control group does not. Because the two groups were treated identically except for the treatment, any subsequent differences in the groups is (tentatively) attributed to the treatment. Thus,the control group is the group NOT receiving the treatment. For example, the scientist could propose that "fish will not die if they stop receiving food" (as a null hypothesis). The scientist then places two fish tanks full of similar fish into the same room, so that temperature, air pressure and light are equal. Then the scientist feeds one tank the recommended amount of fish food, while not feeding the other tank at all. After one week of this treatment, the scientist observes the tank receiving food (the control group) contains live fish while the group receiving the treatment (starvation) only contains dead fish. The scientist would then disprove the null hypothesis and conclude (tentatively) that fish do need food to continue living.


What is the purpose of having a control group?

In conducting a scientific experiment, a scientist should have a control group and an experiment/treatment group. The scientist proposes a null hypothesis (null because it is intended to be disproven). The scientist then treats the two groups identically except the treatment group receives the treatment and the control group does not. Because the two groups were treated identically except for the treatment, any subsequent differences in the groups is (tentatively) attributed to the treatment. Thus,the control group is the group NOT receiving the treatment. For example, the scientist could propose that "fish will not die if they stop receiving food" (as a null hypothesis). The scientist then places two fish tanks full of similar fish into the same room, so that temperature, air pressure and light are equal. Then the scientist feeds one tank the recommended amount of fish food, while not feeding the other tank at all. After one week of this treatment, the scientist observes the tank receiving food (the control group) contains live fish while the group receiving the treatment (starvation) only contains dead fish. The scientist would then disprove the null hypothesis and conclude (tentatively) that fish do need food to continue living.


Used to show that the result of an experiment is really due to the condition being tested?

A control group is used to show that the result of an experiment is due to the condition being tested by providing a baseline for comparison. This group is not subjected to the experimental treatment, allowing researchers to isolate the effect of the variable being investigated.