Suppose you conduct a 4 X 3 factorial experiment.
a. How many factors are used in the experiment?
b. Can you determine the factor type(s)—qualitative or quantitative—from the information given? Explain.
c. Can you determine the number of levels used for each factor? Explain.
d. Describe a treatment for this experiment and determine the number of treatments used.
e. What problem is caused by using a single replicate of this experiment? How is the problem solved?
STAT 2004 CHAPTER ONE: INTRODUCTION TO DATA POPULATIONS AND SAMPLES Population- Represents all people or things of interest. Sample- Observed/measured subset of a population. Data- Observations that form the backbone of a statistical investigation. Summary statistic- A single number that summarizes a large amount of data. Variables- Measured or observed characteristics of data. o Categorical variable- Responses themselves are categories. Nominal- Unordered levels. Ordinal- Ordered levels. o Numerical variable- Counts/measures information. Can take a wide range of numerical values. Sensible to add, subt