Quizzes
Quizzes
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 1 For a stem-and-leaf display A) Arrange the leaf values from smallest to largest. B) Make sure the stem value is only one digit. C) Do not allow stems with no leaf values. D) Include decimal points. 2 Questions 2 to 6 refer to the following information. It reports the number of TV sets sold per day at the Appliance SuperStore. (6.0K) The above arrangement is called a A) Frequency distribution B) A frequency polygon C) A pie chart D) A stem-and-leaf chart. 3 (6.0K) How many days were studied? A) 11 B) 30 C) 50 D) None of the above 4 (6.0K) What was the smallest and largest number of sets sold per day? A) 1, 8 B) 10, 80 C) 11, 88 D) None of the above 5 (6.0K) How many days were there less than 30 sets sold? A) 15 B) 6 C) 30 D) None of the above 6 (6.0K) The actual number of sets sold per day between 60 and 69 is A) 65, 66, 67, 68, 68 B) 60, 69 C) Cannot tell from the information given D) None of the above 7 To draw a box plot that summarizes a data set, A) Two values are required: 1st quartile, 3rd quartile, B) Three values are required: minimum, median, and maximum C) Four values are required: minimum, 1st quartile, 3rd quartile, and maximum D) Five values are required: minimum, 1st quartile, median, 3rd quartile, and maximum 8 The inter quartile range of a set of observations is A) The difference between the minimum and maximum values B) The standard deviation. C) The difference between the 1st and 3rd quartiles. D) Appropriate only for symmetric distributions. 9 For any symmetric distribution A) The mean, median, and mode are equal. B) The mean is the largest measure of location. C) The median is the largest measure of location. D) The standard deviation is the largest value. 10 A coefficient of skewness of -2.73 was computed for a set of data. We conclude that A) The mean is larger than the median. B) The median is larger than the mean. C) The standard deviation is a negative number. D) Something is wrong because the coefficient of skewness cannot be less than -1.00. 11 The purpose of a contingency table is to summarize A) Two continuous, ratio variables B) Two discrete, ratio variables C) Two discrete, nominal or ordinal variables. D) Two discrete, continuous variables. 12 A scatter diagram: A) Is a graphic tool designed to portray the relationship between variables. B) Uses interval or ratio scale data. C) Does not allow negative values. D) Both A and B are correct.