Topic 4 Bi-variate Data Pre-Assessment

Analyze scatter plots and tables! Understand data trends and make predictions.

1. Which of the scatter plots show no trend? 2. The scatter plot below shows the population of a village (p) over time (t). Describe the relationship between the population of the village and time. the population is decreasing over time the population remains roughly the same over time the population is increasing over time none of these 3. The scatter plot shows the study times and test scores for a number of students. Is there a relationship between study time and scores? No, the points are far from a trend line Yes, the points are close to a trend line. The relationship is linear, positive and strong Yes, the points are close to a trend line. The relationship is linear, negative and strong Yes, the points are close to a trend line. The relationship is nonlinear, positive but weak. 4. Which table matches the scatter plot from number 3? 5. You ask middle school and high school students how many TV sets are in their homes. Complete the two-way frequency table to show the results of the survey. 0 14 12 9 25 3 21 6. According to the data in the two-way frequency table below, which statement is true? More teachers work 26-30 years than 19-25 years There were a total of 35 teachers surveyed More police officers work 26-30 years than 19-25 The most common number of years served by all those surveyed was 19-25 years 7. The scatter plot shows the number of CDs that Disc-O CD factory produced in different months. What is the best prediction for the month in which they will produce 5,500 CDs? November September July May