The student conducted a statistical investigation to compare the times it would take to ride to the letterbox and back on three different bikes: their mum's bike, their GT bike, and their old bike. They predicted the times and recorded the actual times, finding that their GT bike was the quickest at 4 minutes and 27 seconds on average, while their old bike was slowest at 4 minutes and 74 seconds on average. Their mum's bike took an average of 3 minutes and 11 seconds.

1. Statistical Investigation
• How long will it take me to ride to my
letter box and back on my bike?
• How long will it take me to ride to my
letter box and back on my mums bike?
• How long will it take me to ride to my
letter box and back on my old bike?

2. Frequency Table
Predictions
Bikes Mums My GT Old One
Prediction 3:00 1:30 – 4:00
Times mins 2:00 mins mins

3. Frequency Table
Actual Times
Bikes Mums My GT Old One
Actual 4:00:74 3:11:87 4:27:68
Times mins mins mins

4. 04:48:00
04:19:12
03:50:24
03:21:36
02:52:48
02:24:00
01:55:12
01:26:24
00:57:36
00:28:48
00:00:00
Mums Bike My GT Old Bike

5. Mode, Median, Range &
Mean
• Mode = 4
• Median = 4:00:74
• Range = 1:16
• Mean = 3:79

6. Interesting Points
• When I went around the corner on
my old bike on the way to the letter
box, I skidded because there was to
much weight on my old bike.
• I knew my GT would be the quickest
because it suits me and fits me
better than the other bikes.

7. Was my Prediction
Correct?
• My new bike was the quickest
because my old bike is too small for
me and I need to grow bigger
before I can ride mums bike
properly.