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Terms in this set (29)
If you were to hypothesize that communication students and history students will differ on their oral communication measures, you would have a
What is the basis for the normal curve?
The null hypothesis refers to the _______, whereas the research hypothesis refers to the
The presence of many uncontrolled variables may lead to low internal validity in that we can't be sure which variables are affecting the observed behaviors. T/F?
Correlation coefficients are used to describe
Cronbach's alpha is used to calculate
Which of the following is the Greek letter associated with Cronbach's alpha, sometimes known as coefficient alpha?
_______ explore(s) the question, "How do I know that the test, scale, instrument, and so on I use works every time I use it?"
Sampling error relates to how well a population approximates the characteristics of a sample. T/F?
What is the standard used by statisticians to determine the probability of an event occurring outside of chance alone?
Statistical significance is also known as the risk of _______.
type 1 error
_______ explore(s) the question, "How do I know that the test, scale, instrument, etc. I use measures what it is supposed to?"
A test can be valid but not reliable, but it is impossible to have a test that is reliable and not valid. T/F?
Which coefficient reflects the occurrence of no reliability?
Research hypotheses refer to
Some statistical tests allow you to make a conclusion that there is a real effect with 100% certainty. T/F?
Which of the following is a characteristic of the normal curve?
p < .05 means that there is less than 1 chance in _______ that any differences found were not due to the hypothesized reason.
This is another word for a negative correlation.
What will you have if there is no difference between sample and population values?
no sampling error
What is the term associated with the lack of symmetry in a distribution?
External validity means the instruments or procedures used in the research measured what they were supposed to measure. T/F?
Under the normal curve, approximately what percentage of scores falls between -1 and +1 standard deviations around the mean?
When writing a research hypothesis, what type of letters are used?
Which of the following is the term associated with identifying differences between groups that are not due to chance?
Which of the following characteristics is associated with the "tails" of the normal curve?
Reliability and validity should be considered
before you start analyzing data
Which of the following represents a null hypothesis?
When we want to infer from a sample to the population, what assumption must be met?
population is normally distributed
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