Download ASSIGNMENT: Descriptive statistics

Introduction To Scientific Analysis (BIO 100)
Name: ___________________________________________
ASSIGNMENT: DESCRIPTIVE STATISTICS
Calculate the mean, median and mode for the head circumference data. Answer the
questions below based on your calculations.
1. Are the 3 measures of central tendency similar to each other? Explain their relationship
to one another.
2. Based on what you know about distributions, why do you think these measures of
central tendency exhibit this pattern?
3. Using Excel or other analytical software, construct a frequency distribution (histogram)
graph of this data (print the graph on a separate sheet of paper). Does it back up your
interpretation above?
Calculate the range, standard deviation, and standard error for the height data for males and
females.
4. How do these measures of dispersion compare across genders?
5. Construct a bar or box-plot graph. Remember, both of these kinds of graphs require
central tendency and dispersion. How do the genders compare now?
Introduction To Scientific Analysis (BIO 100)
Name: ___________________________________________
6. Calculate the coefficient of variation (CV) for the head and height data. Compare the
results. What does the CV tell you about variation of these two traits?
7. Construct a scatterplot of the head and height data. Is there a relationship? If so, does
it look linear or non-linear? Is it a positive or negative relationship? Please describe.