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Which of the following is the most important characteristic of a good sample
the sample should have freedom from bias
Inferential statistics are required for any report of journal article
false
Suppose you read “f = 50; 50%”. What type of statistics are these?
descriptive
What type of statistic is the range
descriptive
Suppose you read “M = 50 (SD = 5.00)”. Sixty-eight percent of the cases fall between which scores?
45-55
How is the mean calculated?
by summing the scores and dividing by the number of scores
Which of the following always have 50% of the cases at or below it?
median
In a correlation, the closer the value is to 1.00
the stronger the association
Which of the following indicates the strongest relationship? -.88, .05, .53, .77
-.88
Which of the following indicates the weakest relationship? .93, -.45, .23, .67
.23
A researcher’s expectation is known as:
the research hypothesis
What type of statistical techniques can be used to test decisions about the null hypothesis?
inferential
What is a synonym for the phrase rejecting the null hypothesis?
results are statistically significant
Which level has the strongest significance?
.001
When a report tells you that the significance level was p< .05 and you see a p value of .029, the p-value is
regarded as
statistically significant
Regarding rejecting the null hypothesis
It is impossible to do so with absolute certainty
The larger the random sample…
the more likely the null hypothesis will be rejected
How often do authors of journal articles explicitly mention the null hypo

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