Guestimating Investigation
Hypothesis
The older the students are the more accurate they will be in
estimating the size of the angle.
Plan
I will take 20 random samples from the 3rd year and 20 random samples
from the 1st year out of a total of 292 individual sets of data. I
will sort this data out and plot a cumulative frequency graph for each
year.
I will take random samples by using the ran# button on my calculator.
When is use the calculator will give a random number from 0-999. I
will use the number after the decimal point. E.g. for 0.088 I would
use number 88 on my list of data.
I will use this table:
Random number on calculator
Subtract by…
1-292
0
301-592
300
601-892
600
e.g. if the number on the calculator came out to 345. I would subtract
300 from 345. Which would give me an answer of 45,
and I can get that from my data. Whereas I couldn't have with the
number 345 because I only have 292 individual data.
People can give false information because they might be messing
around. So this information will not be accurate and I will ignore
this data. I would identify this by looking at the guesses that they
take and the ones that are odd and widely different to all the other
guesses students have taken.
Prediction
I predict that the 3rd years will be more accurate than the 1st yrs,
in estimating the size of the angle. The actual size of the angle is
160 degrees.
Results
1st Years
Number
Angle (degrees)
30
123
46
140
81
120
292
150
191
185
233
165
123
135
191
185
47
160
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