Introduction to Statistics
A. Sample is to ______ as Population is to _______.
B. These statistical procedure are used to summarize, organize and simplify the data from a research study.
C. These statistical techniques allow us to study a sample and make generalizations about their population.
A. Statistics; Parameters
B. Descriptive statistics
C. Inferential statistics
What is the sample size?
X f
5 1
4 2
3 4
Sample size= 7
What can we use to describe the central tendency for nominal data?
(hint: there is only one)
Mode
What happens when you add up all the deviations?
You get zero :)
What planet is known as the Red Planet?
Mars
_____ describes a set of operations for measuring a construct and defines the construct in terms of the resulting measurements.
For example, your intelligence is measured and defined by your performance on an IQ test, or hunger can be measured and defined by the number of hours since last eating.
Operational definition
(Study constructs and operational definition, understand and be able to identify them)
Identify the shape of the distribution:
Median: 35
Mode:55
Mean:15
What percent of scores fall above and below the median?
50% of scores fall above the median and 50% of scores fall below the median.
Why do we use degrees of freedom in the formulas for sample variance and sample standard deviation?
Because we want to calculate an unbiased statistic, providing a much more accurate representation of the population. Without n-1, we will underestimate or over estimate the population parameters.
(Unbiased statistic means that the statistic is equal to the population parameter)
What is the largest ocean on Earth?
The Pacific Ocean
Discrete or Continuous
a. Shoe size
b. Distance traveled in a car
c. Height of building
d. Dive roll results
a. Discrete
b. Continuous
c. Continuous
d. Discrete
What was the lowest score?
What is the lowest POSSIBLE score?
idk
Find the weighted mean :)
One sample has n = 4 scores with a mean of M = 8 and a second sample has n = 8 scores with a mean of M = 5.
Mean = 6
____ is the average distance from the mean.
Standard deviation
Who is the second person to lift Thor's hammer?
(in the movies)
Captain America
Quantitative vs Qualitative
a. Plant height
b. Study method
c. Favorite music
d. Reaction time
a. Quantitative
b. Qualitative
c. Qualitative
d. Quantitative
On Canva
idk yet lol
Find the continuous median:
11, 12, 14, 15, 15, 15, 15, 15, 15, 16, 17
15
Find the range (both for discrete and continuous):
33, 35, 47, 52, 76, 88, 113
Discrete = 80
Continuous = 81
Who painted the famous artwork The Starry Night?
Vincent van Gogh
Identify IV, DV, if dependent variable is discrete or continuous and scale of measurement
- Effect of sleep on exam performance
Also make up a population and sample for this study!
Independent Variable: Hours of sleep
Dependent Variable: Exam score
Discrete or Continuous: Discrete (whole number of points)
Scale of Measurement: Ratio (true zero, equal intervals)
Sample: 20 UNG students
Population: All UNG Students
Fill out the frequency distribution table...
idk yet lol
What measure of central tendency is highly sensitive to changes in scores and outliers?
The mean
For the following sample data, compute the variance and standard deviation. The scores are: 10, 7, 6, 10, 6, 15
S2 = 12
S = 3.46
What element has the chemical symbol Au?
Gold