Biology Forums - Study Force

Characteristics possessed by experimental units are called:
 a. data sets
  b. descriptive statistics
  c. internal data
  d. variables

Q. 2

Survey your friends about the number of siblings they have and the length of the last phone call they had with their boyfriend / girlfriend. Identify the two random variables of interest and list their possible values.

Q. 3

Which of the following statements is true?
 a. Univariate data result when a single variable is measured on a single experimental unit.
  b. Bivariate data result when less than two variables are measured on a single experimental unit.
  c. Multivariate data result when more than two variables are measured.
  d. Both univariate data result when a single variable is measured on a single experimental unit and multivariate data result when more than two variables are measured are true.
  e. Both bivariate data result when less than two variables are measured on a single experimental unit and multivariate data result when more than two variables are measured are true.

Q. 4

Are you getting a summer job? A recent study reported that 68 of college students answered, I have one; 22 said Maybe and 10 said No. Is the variable in question 28 a random variable? Explain.

Q. 5

The two graphical techniques we usually use to present qualitative data are:
 a. bar chart and histogram
  b. histogram and pie chart
  c. bar chart and pie chart
  d. line chart and stem and leaf plot
  e. bar chart and line chart

Q. 6

Are you getting a summer job? A recent study reported that 68 of college students answered, I have one; 22 said Maybe and 10 said No. What is the variable involved, and what are the possible values?

Q. 7

The sum of the frequencies for all classes will always equal:
 a. the number of classes
  b. the class width
  c. the total number of observations in the data set
  d. one
  e. the average

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