Homework 1

Question 16 The average age in a sample of 90 students at City College is 20. As a result of this sample, it can be concluded that the average age of all the students at City College O a. Could be larger, smaller, or equal to 20 O b. Must be less than 20, since the sample is only a part of the population O c. Could not be 20 O d. Must be more than 20, since the population is always larger than the sampleQuestion 18 Because the median is the middle value of a data set, it must always be O a. larger than the mode O b. None of the other answers are correct. O c. smaller than the mode O d. smaller than the mean2.5 points Save A Scanner Data User Survey of 50 companies found that the average amount spent on scanner data per category of consumer goods was $387,325 (Mercer Management Consulting, Inc., April 24, 1997). The $387,325 is an example of O a. Both quantitative data and a descriptive statistic are correct. O b. a descriptive statistic O c. categorical data O d. quantitative dataQuestion 17 If two groups of numbers have the same mean, then their O a. medians must also be equal O b. standard deviations must also be equal O c. None of the other answers are correct. O d. modes must also be equalQuestion 20 A statistics professor asked students in a class their ages. Based on this information, the professor states that the average age of students in the university is 21 years. This is an example of O a. descriptive statistics O b. statistical inference O c. an experiment O d. a census