Why Do Girls Have The Fastest Reaction Time

My research project is all about deciding whether boys or girls have the fastest reaction time. The purpose of my investigation is to either prove or disprove the hypothesis that " Girls have a faster reaction time than boys". The pieces of data collected are displayed in cumulative frequency diagrams, tables and box plots.

First of all, we got the average reaction time from each student in the class. After that, we put the boys' data and the girls' data into two separate columns. We then put those results in a table ordering them from smallest to biggest. This made it easier to group the data together so that we could create a cumulative frequency diagram for the boys and the girls.

However, before we plotted the cumulative frequency diagram we decided to find the mean from the tables. The mean is found when you calculate the midpoint of each group and multiply it by the frequency displayed next to it. You repeat this for each row. After you have multiplied all the midpoints by the frequency you add up your results. That answer should be divided by the total of the frequency column and that should give you the mean. The average mean for the boys was 394.6 and for the girls, it was 421.7. The mean shows what the majority of people will have scored near to for example most girls would have scored around 422.

Before drawing the cumulative frequency diagram, we need to work out the cumulative frequencies. This is done by adding the frequencies in turn. The cumulative frequency goes on the y-axis and the reaction time ( which is in milliseconds) goes along the x-axis. The cumulative frequency graph presents a curve always going upwards. Eventually, both cumulative frequency diagrams were drawn and these were the