Module 1
A scientist or researcher who studies individuals and groups in relation to society.
What is a social scientist?
Statistical symbols we learned this module.
What is f (# of occurrences) and n (sample size)?
Measures of central tendency
are scores that represent the
center of the distribution.
What are mean, median, and mode?
Basic measure of variability?
What are range, variance, and standard deviation?
Transforms scores to a distribution that has a mean of 0 and standard deviation of 1.
What is standard score or z-scores?
All data collected are recorded on one of the three levels of measurement.
What are nominal, ordinal and scale?
Types of frequency distributions.
What is ranked, simple, and grouped frequency distribution?
Distributions that are ________ have one side of the distribution where the data frequency tapers off
What is skewed?
Distance of any given raw score from its mean.
What is deviation?
The measure of how likely it is that a given event or savior will happen.
How do you solve for it as well?
What is probability?
P= # of times the outcome or event can occur/ total number of times any outcome or event can occur
x 100
A sociologist tries to examine the relationship between being drunk and a person's bowling scores. Identify the independent and dependent variable.
Independent Variable: Drunk
Dependent Variable: Bowling scores
The time it takes participants to say the name of a color ranges from 600 to 1139 milliseconds. The desired number of class intervals is 12. What is range and interval size?
Range = 539
Interval size = 45
If the mode is greater than the mean, what type of skew will you have?
Negative skew
A sociologist surveyed a group of high school students about their use of various drugs, including alcohol. Asked how frequently they had been drunk in the previous six months, the students responded as follows. The variance is 3.964, so the standard deviation is?
standard deviation: 1.991
A local school district wants to compare the math scores of several of their students to the state scores. The mean and standard deviation of the local school district scores are as follows: X = 74, S = 5.45. If a student had a score of 66, compute the z-score.
z= -1.486
What is a hypothesis?
Referencing your module 2 assessment, 90.6 percent of respondents have how many children or less?
What is 4?
Ten long-term psychiatric patients were questioned about how many times they were visited by family members during the previous month. Find the mean, median and mode.
7, 0, 6, 1, 0, 0, 3, 5, 4, 2
mean= 2.8
median= 2.5
mode= 0
Two students in a behavioral sciences class compared their scores on a series of five quizzes. Which student tended to perform better on the quizzes? Which student tended to perform more consistently on the quizzes?
Student A SD= 2.885 Student B SD= .837
Student A: 4,9,3,8,9
Student B: 6,5,7,5,6
Student A tended to perform better on the quizzes. Student B performs more consistently on the quizzes.
What is the probability of a faculty member being a male with a Ph.D. and an “other” ethnicity background?
N= 50
Male- 32
Ph.D.- 43
Other 4
4.403%
A clinical psychologist has two groups of identical nerve cells living in separate dishes. She proposes to apply different concentrations of a nerve-blocking agent to the groups of nerve cells and to measure any change in the number of nerve impulses generated by the nerve cells. Write an alternative and null hypothesis.
Alternative: There will be a change in the number of nerve impulses generated based different concentrations of nerve- blocking agents.
Null: There will be no change in the number of nerve impulses generated based different concentrations of nerve- blocking agents.
Refers to the dependent variable being measured. It can be illustrated by the number of rows (horizontal) in a table. The variable can be nominal, ordinal, or scale (interval/ratio) levels of measurements.
What is class interval?
Data taken from a survey asking students, “On average, how many times do you eat at a fast-food restaurant? Compute the mean, median, and mode for the data.
N= 32Number of Times Per week f
6 4
5 6
4 5
3 7
2 4
1 3
0 3
mean= 3.313
median=3
mode=3
If the sum of (x-mean)2 = 10 and n =5. The standard deviation is
What is 1.581
On one 100-point test, Bill managed to get 87 points. On a separate 100-point test, Joe managed to get 87 points. But when these points earned were converted to z scores, Bill received -.50 and Joe received -.05. Which of these students received a higher score?
Joe