ch 1 & 2 Intro &scaling ch 3 & 4 frequency & mesaures of central tendency ch 5 Measures of varibity ch 6 Z-score ch 10 Hypothesis testing

100

What is nominal data
The scale of measurement that is categorical with no properties of the real number system.

100

4
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

100

summarize and describe the extent to which scores in a distribution differ from one another.
Measures of variability are used to

100

compare and interpret scores from virtually any distribution.
The z-score transformation is a useful statistical tool because it enables statisticians to

100

Type I error
Stating that the null was false when it was indeed true.

200

population
The entire group of interest is called the....

200

Normally distributed
When a distribution’s mode = median = mean, it is said to be

200

It equals zero
What is the problem with calculating the average of the deviations?

200

the raw score is equal to the mean
A z-score of zero always means that

200

Type II error
Lower alpha increases the chances of making this error.

300

an inferential statistic
In order to make statements about the population from information obtained from a sample, we must use

300

What is hypothesis?
Determines the direction of the study; its measures, scaling and thereby statistical analysis. It is the prediction being made or the question being researched.

300

the wider the spread of the scores
In general, the larger the value of the standard deviation

300

0; 1
The mean of a z-score distribution is always __________, and the standard deviation is always __________.

300

What is Accept the Null?
What one does when the obtained probability is larger than alpha.

400

dependent variable
The variable that is measured as an experiment is being carried out is called the

400

What are inferential statistics?
When sample data is used to generalize to other samples within the population, what type of statistics is used?

400

Estimating the population (N-1)
If you were interested in determining the variance for a sample nnot tested, which equation would you use?

400

What does the standard deviation mean?
Daily double!!!!! Place you bid for the mystery question....

400

A one tail
When a hypothesis states a direction to its perdiction, it is called...

500

Normal distribution
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.

500

3
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

500

when you knew the entire population.
when would you use the population standardard deviation?

500

3
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?

500

Confounding
Even if statistical significance is found, one must rule out other variables having possibly impacted the results. What hypothesis is considered here?

Statistics Quiz 1

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