The scale of measurement that is categorical with no properties of the real number system.
What is nominal data
100
Find the mode of the following data set.
8, 7, 2, 4, 4, 8, 2, 4, 6, 5, 7, 3, 9, 4, 5, 4, 7
4
100
Measures of variability are used to
summarize and describe the extent to which scores in a distribution differ from one another.
100
The z-score transformation is a useful statistical tool because it enables statisticians to
compare and interpret scores from virtually any distribution.
100
Stating that the null was false when it was indeed true.
Type I error
200
The entire group of interest is called the....
population
200
When a distribution’s mode = median = mean, it is said to be
Normally distributed
200
What is the problem with calculating the average of the deviations?
It equals zero
200
A z-score of zero always means that
the raw score is equal to the mean
200
Lower alpha increases the chances of making this error.
Type II error
300
In order to make statements about the population from information obtained from a sample, we must use
an inferential statistic
300
Determines the direction of the study; its measures, scaling and thereby statistical analysis. It is the prediction being made or the question being researched.
What is hypothesis?
300
In general, the larger the value of the standard deviation
the wider the spread of the scores
300
The mean of a z-score distribution is always __________, and the standard deviation is always __________.
0; 1
300
What one does when the obtained probability is larger than alpha.
What is Accept the Null?
400
The variable that is measured as an experiment is being carried out is called the
dependent variable
400
When sample data is used to generalize to other samples within the population, what type of statistics is used?
What are inferential statistics?
400
If you were interested in determining the variance for a sample nnot tested, which equation would you use?
Estimating the population (N-1)
400
Daily double!!!!! Place you bid for the mystery question....
What does the standard deviation mean?
400
When a hypothesis states a direction to its perdiction, it is called...
A one tail
500
A distribution that is symmetrical, that has as its middle score the score with the highest frequency, and that has decreasing frequencies as scores move further from the middle score is called a(n) __________ distribution.
Normal distribution
500
In a simple frequency distribution constructed from the data 9, 8, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 0, 0, the score “7” would have an f of
3
500
when would you use the population standardard deviation?
when you knew the entire population.
500
Alicia scored a 70 on her psychology quiz, but the class as a whole averaged a 40. If the standard deviation was 10, what was Alicia’s z-score?
3
500
Even if statistical significance is found, one must rule out other variables having possibly impacted the results. What hypothesis is considered here?
Confounding
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Statistics Quiz 1
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