Vocabulary
Information coming from observations, counts, measurements, or responses.
What is Data?
The percent of the data that falls within 1 Standard Deviation
What is 68%
Find the mode of this set:
3,4,4,5,6,7,8,9
Mode: 4
Describes the spread of data
What is range?
Shows normal distribution of data.
What is a bell curve?
A statistical measure of data that shows how much individual data points in a dataset vary from the mean
What is Standard Deviation?
Conditions under which you reject the null hypothesis
What is when the calculated Chi- Square is larger than the critical value at the designated alpha?
Find the mean and mode of this set:
3,5,7,7,8,8,8
Mean: 6.6
Mode: 8
The measure of variability that calculates the middle 50% of the data
What is the interquartile range?
Determined by subracting one from a sample data set
What is the degrees of freedom?
A smaller number or part of all the members in a group.
What is a sample or set?
The mean for number of months at a job for teens is 4, standard deviation is 1.5. An student stays at job for 7 months. Within how many standard deviations is the student's employment?
What is 2 standard deviations?
Find the mean and median of this set?
3,4,5,6,7,8,10
Mean: 6.1
Median: 6
Data that makes a bell curve (has no skew).
What is normal distribution?
Take the square root! (hint: What step is this to what process?)
What is the last step to determining standard deviation?
The hypothesis that the condition or variable has no effect.
What is the null?
Data points are spread out over a large range of values. The data set is less consistent and less reliable.
Example: A test where scores vary wildly, from very high to very low.
What is a high standard deviation?
What is the mean, median, and mode of this set:
3,4,5,2,1,1,1,1
Mean: 2.25
Median: 1.5
Mode: 1
When the mean is greater than the median.
What is skewed right?
A range of values likely to contain an unknown value for a population given a specific confidence level
What is a confidence interval?
Data points are generally close to the average value.
The data set is more consistent and reliable.
What is a low standard variation?
You survey 10 psychology students who all say that they love statistics. You infer that all/most of psychology students love statistics.
What is an example of Inferential Statistics?
What is the, mean, median, and mode of this set:
509, 50, 20, 80, 45, 50, 30,
Mean:112
Mode:50
Median: 50
When the mean is less than the median.
What is skewed left?
Th "O" and "E" in the Chi Square calculation
What is observed and expected?