Show:
Types of Studies
Measures of Central Tendencies
Experimental designs
Percentiles
Surprise
100
An observational study is considered this type of Research______.
What is a descriptive study
100
The number that occurs in a data set repeatedly is called the___.
What is the Mode
100
Experimental designs if conducted correctly have good_____validity.
What is internal validity
100
If Nancy is told she tested in the 85th percentile that means___.
85% of the test scores were equal or below her score.
100

A ___is the type of graph used with a frequency table.

what is a histogram


200
Jack is studying baboons in the wild. What type of study is this___.
Naturalistic observation
200
The___cuts a distribution in half so 50% scores above 50% below.
What is the median.
200

Jack is studying the effects of alcohol on memory.

He has 30 subjects drink beer the other 30 subjects get alcohol free beer and their memory for a 30 min video is tested.

Alcohol vs. Non-alcoholic drink is the__

What is the independent variable
200
The  50th percentile  of the distribution is considered__.
What is the median
200

The mean of the exam is 78 and the Median is 82. This distribution is_____skewed.

What is negatively

300
This is used to gather information on people's attitudes likes or opinions.
What is a survey.
300
The mean is always a number within the distribution.
What is false.
300

The title of the research is "The effects of caffeine on anxiety" Some subjects receive caffeine and others do not.

what is the dependent variable____.

What is anxiety.
300

In the percentile formula below what does the L stand for? 

L + [N(p)-nL]I/  nw

What is the lower limit of the reference score
300

The Pearson correlation can range from __to __.

-1.00 to +1.00

400
Dr. Maxwell has just met with a patient who had a stroke and now talks with a foreign accent. Researchers now believe there is a brain area for accents but cannot rule out other brain issues. This is called a___.
Case study
400
If the mean is less than the median then the distribution is___ skewed.
What is Negatively
400

JC is study the influence of contact sports on aggressive behavior. Before he begins collecting data he needs to _____.


It has already been approved by IRB

Operationally define aggression.
400

L + [N(p)-nL]i / nw

Solve the problem below for the 50th percentile

4.5+ {30(.50)-15}/2

What is 4.5
400

Jack wants to study how much tea people on campus drink compared to coffee. To make any comparisons he needs to use a____.

What is standard or z score.

500
June is studying the relationship between how long a couple dates and whether or not they get married. This is an example of a ____study.
What is a correlational study.
500

Given these set of numbers what is the mean?

4

5

6

1

What is 4
500
AJ was hired by the police to study the speed of traffic and to use a "fake police car" on an overpass to see if this helps reduce speeding. He takes the average speed for 2 months then "presents the police car for 2 months. AJ's study is__
Quasi experimental design
500
In order to calculate a Z-score or Standard score you need to know the ___and ___of the distribution.
The mean and SD
500

Jose just received his SAT scores back and it indicates that he is in the 84th percentile. Which means__.

What is 84% of the students taking the exam scored at or below Jose.