Which of the following is true of the data set represented by the box plot?
a. the greatest value in the set is 79
b. the data is evenly distributed throughout the middle half
c. the data has an iqr of 45
d. removing the outliers would not affect the median

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?