Descriptive Statistics
Basics
Sampling
Experimental Design
Random
100
What is a standard deviation?
What is a standard measure of how far apart every observation is from the mean
100
The percent of alcohol in hand sanitizer (data type)
What is quantitative - continuous
100
Random Number Generator
What is Used in random sampling and randomization - usually use software/website to obtain random numbers
100
Observation study
What is Researchers not controlling conditions, just observing them
100
Factor
What is Categorical explanatory variable
200
Describe the shape of the histogram
What is left-skewed
200
Researchers are interested in the true sugar content of a serving of Quaker Oats granola. What parameter should they estimate?
What is the mean amount of sugar (grams) per serving of all Quaker granola
200
Advantage of simple random sampling
What is simplest method, everyone has equal chance of selection (avoids selection bias)
200
Experiment
What is Researcher is controlling the conditions the subjects in the study are subject to
200
Treatments
What is all combinations of the factor levels
300
When is the median a better measure of center than the mean?
What is If the distribution is very skewed
300
Identifying the research objective, Collecting data, Summarizing data, Drawing conclusions
What is The Statistical Process
300
Why use stratified sampling?
What is to ensure members of specific groups included in study
300
Randomization
What is Allocating EUs to treatment groups using a random process
300
Having a sample that accurately reflects the population (in terms of the variables of interest)
What is Generalizability
400
Jenny earns a 90 on each of her 3 exams. Paul earns a 85 on 2 exams and a 87 on his third exam. Who has the higher standard deviation?
What is Paul
400
The process of generalizing information from a sample to a population
What is statistical inference
400
Subject to selection bias
What is convenience samples
400
Replication
What is having multiple EUs in each treatment group
400
Measurement error
What is variation/imprecision in measurement of response variable
500
If a histogram is skewed left, the median will be ________ the mean
What is greater than
500
A parameter
What is a summary value describing a population
500
Simple random sampling
What is Method where each person in the population has the same opportunity of being picked
500
Provide an example of when blocking would be a good experimental design choice
What is when you have a lurking variable and want info on all groups
500
4 sources of experimental error
What is inherent variability, measurement error, variation in applying treatment, & lurking variables
M
e
n
u