MATH 302 Quiz 1 - Question and Answers | LATEST ANSWERS

MATH 302 Quiz 1 - Question and Answers Question 1 of 20 1.0/ 1.0 Points What is the term for a characteristic or attribute that can assume different values? A.datum B.exponent Correct C.variable D.sample Question 2 of 20 1.0/ 1.0 Points A pareto chart does NOT have which of the following properties? A.It is used to represent categorical data B.The frequencies are arranged from highest to lowest Correct C.The frequencies are arranged from lowest to highest D.It is a bar chart Question 3 of 20 1.0/ 1.0 Points Suppose that a histogram of a data set is approximately symmetric and "bell shaped". Approximately what percent of the observations are within two standard deviations of the mean? A.50% C.68% D.99.7% Question 4 of 20 1.0/ 1.0 Points Suppose that a histogram of a data set is approximately symmetric and "bell shaped". Approximately, what percent of the observations are within three standard deviations of the mean? A.68% B.95% C.99.7% D.50% The amount of time needed to run the Boston marathon is an example of which type of variable? A.continuous B.none of the above C.qualitative D.discrete Question 6 of 20 1.0/ 1.0 Points Gender and State are examples of which type of data? A.Discrete data B.Continuous data C.Ordinal data D.Categorical data Question 7 of 20 1.0/ 1.0 Points The average score for a class of 30 students was 75. The 20 male students in the class averaged 70. The 10 female students in the class averaged: A.70 B.75 C.60 D.85 Question 8 of 20 1.0/ 1.0 Points Data that arise from counts are called: A.continuous data B.nominal data C.counted data D.discrete data Question 9 of 20 1.0/ 1.0 Points Researchers may gain insight into the characteristics of a population by examining a A.mathematical model describing the population B.description of the population C.replica D.sample of the population Question 10 of 20 0.0/ 1.0 Points What type of graph is the figure below? A.ogive B.relative frequency histogram C.pictograph D.Pareto chart Question 11 of 20 1.0/ 1.0 Points Which of the following statements are false? .A categorical variable is nominal if there is natural ordering of its possible values. B.A variable is numerical if meaningful arithmetic can be performed on it. C.Zip codes are usually treated as categorical variables, although they appear to be numerical. D.All of the above Question 12 of 20 1.0/ 1.0 Points For a boxplot, the box itself represents what percent of the observations? A.middle 50% B.lower 25% C.100% D.upper 75%