# Looking for some examples of hypothesis?

An experiment is a research method used by psychologists which involves the manipulation of variables in order to discover cause and effect. It differs from non-experimental methods in that it involves the deliberate manipulation of one variable, while trying to keep all other variables constant.

## Experimental Questions and Hypotheses - Missouri S&T

### Define experimental hypothesis - …

This is why, for example, we can be more confident of research results that are consistent with a causal-directional hypothesis, than is the case of findings that are consistent with a non-directional hypothesis.

### Learn About Null Hypothesis and Alternative Hypothesis

Any statistic can have a sampling distribution - adistribution of values produced by different samples. The differencebetween two means, for example, has a sampling distribution that tends to benormal. If the null hypothesis is true (if the difference between thepopulation means is really zero), then the sampling distribution of thedifference between two means will have a mean of zero. If we know shape ofa distribution (in this case it is a normal distribution) and we know its mean(zero if the null hypothesis is true in this case), then we can figure out theprobability of a particular value occurring by looking at where it falls in thisdistribution. Thus, for any two sample means, we can figure out theprobability (of finding a difference between them as large as the onewe found if the null hypothesis were true.

## Hypothesis Definition, Checklist, and Examples

Psychologists often use the experimental method to determine define experimental hypothesis if changes in one variable researchers identify and define key variables, formulate a hypothesis,.

## A hypothesis is a tentative statement about the ..

Before researchers carry out experiments they operationalise the variables and create hypotheses. A hypothesis is a testable, predictive statement.