Experimental Group: What is it and How to Use it

QUESTION 1 

Bree hypothesized that members of the experimental group would score differently than the control group. Her hypothesis was a: 

		Nondirectional alternative hypothesis
		Directional alternative hypothesis
		Null hypothesis
		Type 1 hypothesis

1 points    

QUESTION 2 

What is the median of the following set of scores: 18, 6, 12, 10, 14? 

		10
		14
		18
		12

1 points    

QUESTION 3 

Which will have the highest score value in the distribution? 

		The mode
		The median
		The mean

1 points    

QUESTION 4 

Which of the following statements is a null hypothesis? 

		The coin is not fair
		There is a correlation in the population
		There is no difference between the incomes of men and women in the population
		The defendant is guilty

1 points    

QUESTION 5 

If a research finding is statistically significant, what else should you determine? 

		The strength of significance
		The practical significance
		The probability value
		The alpha level

1 points    

QUESTION 6 

When is the median the best measure of central tendency? 

		The data are in a symmetrical distribution
		When there are a large number of cases
		There is a great deal of variability in the scores
		The data are highly skewed

1 points    

QUESTION 7 

During significance testing, Dr. Gray looked at his data to see if the relationship between his independent and dependent variables was large enough to be meaningful. In doing so, he was investigating: 

		Statistical significance
		Practical significance
		Probability significance
		Effect size significance

1 points    

QUESTION 8 

On his statistics test, Tom has to calculate a mean on the following scores: 5, 5, 10, 15, and 15. What answer should he come up with? 

		5
		9
		10
		15

1 points    

QUESTION 9 

A table listing the values of a variable and their frequencies of occurrence is called: 

		The standard deviation
		A point estimate
		A frequency distribution
		A scatter plot

1 points    

QUESTION 10 

On an IQ test with a mean of 100 and a standard deviation of 15, what is the z score for someone with an IQ of 70? 

		-1.30
		-2.00
		-1.00
		-13