Behv 5622- Practice: Calculate

The supervisor of the study hall observed that too many students were off-task. He brought in 6 extra monitors and trained each of them to observe one particular student (the 6 who seemed to be studying the least). Each monitor listened through earphones to a cassette tape of a beeper going off once every 2 minutes. The monitor observed the student constantly and then made a checkmark on the data sheet when the beep sounded if the student was studying during the entire previous 2 min. The monitor continued this observation method throughout the 50-min study hall period. If the data showed 25 marks for student #1, what percentage of the study hall time was this student studying?

100

Ms. Ellison had been working with Carlos on his multiplication tables. After weeks of practicing, she decided to see how many problems he could answer during a 1-min timed test. Since Carlos got nervous under pressure, it often took him a long time to get started. Ms. Ellison started collecting data on the amount of time it took Carlos to begin once she said, "Go". She collected data for 7 days and found that Carlos spent a total of 126-sec not working on his tests after Ms. Ellison said, "Go". Calculate the percentage of time Carlos spent not engaged in his tests.

30

Students in Park Hill Junior High decided to measure littering on the school grounds as a project for the environment module in their science class. They observed for an hour and took data. They found that 50 students dropped a total of 70 pieces of litter in a trashcan, and 30 students dropped a total of 30 pieces of litter on the ground. What proportion of the observed responses was littering?

30%

At the local Telecommunication Center, the manager, Mr. Davis, wanted to know how much time his worst employee spent talking on the phone during his sales calls. He monitored his calls for 4 hours a day, 5 days a week, for 4 consecutive weeks. Mr. Davis found that he spent a total of 32 hours talking on the phone over the 4-week period. Calculate the percentage of time this employee spent talking on the phone over the 4-week period.

40

Mr. Hughes noticed that Adam spent a large portion of class throwing various items from his desk instead of working on assignments. Since he learned how to take data in one of his behavior analysis classes back in college, Mr. Hughes decided to spend 10 min each day observing how often Adam threw pencils, paper, and other items. Mr. Hughes took data for 5 days and divided the 10-min period into 10-sec intervals. The behavior of throwing was scored if it occurred at any time during the interval. The data showed that Adam spent a total of 120 intervals throwing items on the floor. Calculate the percentage of intervals Adam was shown to be engaging in the problem behavior.

40

Katie's teacher wanted to do something about her talking during class. Before designing an intervention, she was interested in finding out approximately how much time Katie spent talking instead of doing her schoolwork. She decided to observe Katie's behavior for 15 minutes a day for 2 weeks (10 school days). She divided the 15-minute sessions into 10-second intervals and scored it as an occurrence if Katie was talking at any time during each interval. Her teacher found that Katie spent a total of 450 intervals talking to other students. Calculate the percentage of intervals Katie spent talking during class.

50

During detention, the students were required to clean pencil/pen markings off the top of the desks. Students often spent more time reading the messages than washing them off, so the monitor of detention decided to take data. He listened through earphones to a tape that was set up to beep every 60 seconds. When he heard the beep, he would observe the first student and make a check if this student was actually cleaning the desk. When the beep went off for the second time, he observed the second student and did the same thing. The monitor continued doing this throughout the entire 45-minute period until he had observed every student and then would start again with the first one. At the end of detention, he reviewed his data sheet and found 27 checks. What proportion of detention were students cleaning the desks?`

60%

Isharah wanted to know how much time her daughter Brooke was spending working on her school homework assignments. She collected data after school 2 hours a day, 5 days a week, for 3 consecutive weeks. Isharah's data showed that Brooke spent a total of 24 hours doing homework over the 3-week observation period. Calculate the percentage of time Brooke spent doing her homework during this 3-week period.

80

The dishwashers at Sweet Tooth Cafe were not drying the drinking glasses before putting them on the shelf. The wait staff started counting the number of dry glasses after each load had been washed. In the first load, Waiter X counted 75 dry glasses. For that same load, Waiter Y counted 60. What was their interobserver agreement?

80

The wrestling coach wanted to make sure that his JV team was running the entire time during their 30 minute run. He brought in 7 Varsity wrestlers to observe the JV team during practice so that each of them could observe 1 person. He set a timer to sound every 30 seconds and told the Varsity members to make a checkmark if their wrestler had been running the entire time during that interval. The coach was surprised to learn that all but 1 wrestler ran for the entire 30 minutes. For the one that didn't, his data sheet showed that he had a total of 48 checkmarks. What percentage of time did this wrestler spend running?

80

Ernie was having a difficult time making eye contact with his parents when they called his name. His therapist recommended that they collect data on the amount of time it took for him to look at one of them once they called his name. Both one of his parents would say, "Ernie" and then they would count the number of seconds it took before he would look at him/her. At the end of their session, the parents totaled up the amount of time it took for Ernie to look at them. His mother reported 30 seconds and his father reported 36 seconds. What was their interobserver agreement for this session?

83

The cashiers at ToyWorld were supposed to thank every customer before they left by saying, "Thank you for shopping at ToyWorld." Since the manager didn't want his customers to forget where they were shopping, he emphasized the importance of mentioning ToyWorld, and said that "thank you" just wasn't good enough. He set up a program where each cashier's bag boy collected data on whether each cashier said the proper statement during their 4-hour shift. For one particular cashier, the bag boy reported that she said "Thank you for shopping at ToyWorld" 48 times and said "Thank you" 8 times. What proportion of the observed responses was stated correctly? Round up to the nearest percentage point.

86

You take your mid-term exam, which consists of 40 questions. You miss 5 questions on your first attempt. What percent did you earn in your first attempt?

87%

Two students at Park Hill Junior High wanted to find out if littering was worse on weekends than on school days. They went to the school yard very early on Monday morning to count the pieces of litter on the ground. Student A counted 125 pieces. Student B counted 110 pieces. What was their interobserver agreement?

88%

Two student teachers took data with a stopwatch on how long it took before Liang said the word when each flashcard was held up. At the end of the class session, they totaled up their data and turned it in to the instructor. TA 1 reported a total of 50 sec; Ta 2 reported 55 sec as the total. What is their interobserver agreement for this session? (round off your answer)

90

The study hall monitor was trained to make a mark on the data sheet if student 1 was studying (reading a textbook or taking notes) when the 1-min timer went off for the first time. Then the monitor would focus on student 2 and mark the data sheet when the timer went off the second time. The monitor continued to focus on a different student each time, until observing the final student, and then started again with student 1. The study hall period lasted for 50 min. The data showed 45 checkmarks at the end of the study hall period. What proportion of the study hall period were students studying?

90%