In Denizli, Turkey, 22 16-17-year-old students worked in groups to investigate whether there is any relationship between students’ moods, thoughts and behaviours (psychology) and the weather (daily temperature and weather conditions).

They also examined the relationship between students’ psychology and several other variables that each group was interested in, such as sleep time, finances, future anxiety, having eaten breakfast, parent’s health, gender and similar. The key skills that we have sought to develop include; formulating statistical questions, measuring and collecting data, using CODAP to organize and visualize data using dot plots, bar graphs and line graphs, describing data distributions and their characteristics, such as arithmetic mean, mode, median and standard deviation, interpreting data and drawing conclusions from data. The project took up approximately 17 class periods (each 40 minutes) over seven weeks.

The weather-related data, such as daily temperature and weather conditions, were gathered from the Turkish National Meteorology Office website and our other data, such as sleep time, finances etc., were collected by the students using questionnaires that they developed based on their research questions. Students had some prior statistical knowledge, such as visualizing and interpreting data and calculating the measures of central tendency and variability.

After the implementation of the first pilot project, we decided that an explicit focus was needed on the following: (1) emphasizing the notion of distribution as an aggregate group of data values, (2) the use of dot plot representation to visualize distribution shape, (3) discussion of what is a statistical question and what is not, and (4) a trial activity exploring how to use CODAP to organize and analyze data before the actual project.

Click to enlarge

Click to enlarge

**Some of the conclusions that they have reached based on their data analyses in CODAP were as follows:**

- As seen in the graph, there is no relationship between sleep time and daily temperature because r
^{2}is 0,015. (group 4)

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