Statistics Online Questions & Answers

Statistics Online Questions & Answers *the median for the given set of six ordered data values is 29.5 - ANSWER: 7 12 21 38***** 41 51 a data set will always have exactly one mode - ANSWER: false a histogram of a set of data indicates that the distribution of the data is skewed right. which measure of central tendency will likely be larger, the mean or the median? why? - ANSWER: the mean will likely be larger because the extreme values in the right tail tend to pull the mean in the direction of the tail a marketing research firm wishes to determine the most effective method of promoting a rock band: print, radio, television, or online. the researcher segments volunteers by their ages. of the 490 volunteers, 140 are under 20 years old, 70 are 20-39 years old, 140 are 40-59 years old, and 140 are 60 years old or older. the volunteers from each group are randomly assigned to either the print advertising group, the radio group, the television group, or the online group. each group is exposed to the advertising. after 1 hour, a recall exam is given with the proportion of correct answers recorded. - ANSWER: randomized block design response variable: the scores on the recall exam explanatory variable manipulated: type of advertising 4 treatments a polling organization conducts a study to estimate the percentage of households that has two incomes. it mails a questionnaire to 1841 randomly selected households across the united states and asks the head of each household if he or she has two incomes. of the 1841 households selected, 42 responded. - ANSWER: nonresponse bias