Vocabulary
The total set of ALL units in the targeted study. (Uses μ and σ for mean and standard deviation).
What is Population?
____ = Quartile 3 - Quartile 1
What is Inner Quartile Range (IQR)?
Qualiative Data uses _____ or _____, while quantitative date uses ____ or _____.
What are Bar Graphs, Pie Charts/ Stemplots, Histograms?
Every item in a population has a random chance of being selected.
What is Simple Random Sampling (SRS)?
R= Rock, P= Paper, S= Scissors
{RR, RP, RS, PP, PR, PS, SS, SR, SP}
This an example of:
What is a Sample Space (of rock paper scissor outcomes)?
A smaller subset from which we gather data. (Uses X̅ and S for mean and standard deviation).
What is Sample?
_____ = (number of ways event can occur)/ (total number of outcomes)
What is Probability of An Event?
A group of people is asked to give their phone numbers. This is an example of ____ data.
What is Qualitative?
Individuals decide themselves to be in the study.
What is Voluntary Sampling?
What percentage of data falls within 1 standard deviation of the mean (on either side)?
68% OR 68.2%.
The _________ of a variable tells us what it takes and the frequency of these values.
What is Distribution?
____ = (x - μ)/ σ
What is Z- Score?
A group of people is asked to choose what their favorite soda is between Coke, Pepsi, and Dr. Pepper. This is an example of _____ data.
What is Qualitative?
The population is placed in an order and every nth item/ person is chosen.
What is Systematic Sampling?
When finding Quartiles 1 and 3 in a data set with an ODD number of values, I must exclude this value.
What is the Median?
i.e:
1, 1,^ 1, 3, [4], 4, 8,^ 9, 11
Values that describe the absolute median, the upper half median, and the lower half median.
What are Quartiles?
To find the _____ you must:
1. subtract the mean from each individual data point
2. square each of those values
3. add them together
4. multiply by ( 1/ number of data points- 1)
5. take the square root
What is Standard Deviation?
A group of people is asked how many different houses they've lived in throughout their lifetime. This is an example of_____ data.
What is Quantitative?
The population is divided into intentional groups, and a Simple Random Sample is taken of each.
What is Stratified Sampling?
If I am trying to find the standard normal probability of a Z- score that falls on the _____ side of the mean, I must subtract the answer that the table gives me from 1.
What is Right?
Includes columns for variable, counts, percents, and a final row for calculating totals which can be used to create a graph or visual.
What is a Frequency Distribution Table?
____ = Quartile 1- (1.5 x IQR)
____ = Quartile 3+ (1.5 x IQR)
What are Outliers?
A group of people is asked to give the ages of their mothers when they were born. This is an example of _____ data.
What is Quantitative?
A random group of items is chosen and every item in that group is selected.
What is Cluster Sampling?
Failing to include everyone from the population as potential candidates in your study is called _____.
People refusing to participate in your study even though you asked is called _____.
What is Selection Bias?
What is Non- Response Bias?