Exploring One Variable Data
The difference between categorical and quantitative variables
Categorical→categories/words and Quantitative→numbers
The best r(correlation) value for your line to be very strong and positive
what is r=1?
The difference between a population and sample
The population is the entire group of individuals we want information about and the sample is a subset of individuals in the population
An example of a device you can use to randomly assign in a simulation
What is a Dice, coin, RandInt, etc?
The expected # of successes and failures are at least 10
What is Large Counts?
You need these 5 things in your answer to describe a distribution
What is Context, shape, unusual features, center, and variability?
You need these 5 things in your answer to describe a relationship in a scatterplot
What is context, strength, direction, form, and unusual features?
The sampling method that selects individuals from the population who are easy to reach
What is a Convenience sample?
Complement Definition
The probability of an event not happening
This condition states that the sample has to be at least 10% of the population
What is the 10% Condition?
An advantage and disadvantage of using a boxplot
Advantages is that it helps you see all data, ordered least to greatest while a Disadvantages is that some scales make it difficulty to see all values, can be overwhelming for large data sets
What is one thing missing in this predicted line of best fit: y=a+bx
The hat over the p or describing x=__ and y=__?
Undercoverage bias definition
Some members of a population cannot or are less likely to be included in a sample
The term called for events that cannot occur together
what is mutually exclusive?
The difference between a parameter and statistic
The parameter describes a population and the statistic describes a sample
How the mean and median compare for a symmetric distribution
The mean and median are approximately the same
The slope interpretation
With each additional x-variable the predicted y-variable increases/decreases by slope value
A group of experimental units that are similar
What is a block?
The Law of Large Numbers States ____
If we do something many, many times, the proportion of desired outcomes will approach its probability
When sample size increases, variability _____
What is decreases?
The 1.5IQR rule to find outliers
What is <Q1-1.5IQR and >Q3+1.5IQR?
Extrapolation definition
The use of a regression line for prediction far outside the interval of values of the explanatory variable x used to obtain the line. Such predictions are often not accurate
A prospective observational study definition
You track and observe individuals into the future
Independent Events definition
When knowing one event has occurred or has not occurred does not affect the probability of the second event. P(B/A)= P(B)
When Sample size increases, the mean____ and standard deviation ______
Mean would stay the same and standard deviation would decrease