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Hello John, I am having problems with this question from the BPP Study Text
The sales of colour televisions on each of 40 days was as follows
DAILY SALES FREQUENCY MIDPOINT FX
> 0 less than or equal to 3 8
> 3 less than or equal to 6 16
> 6 less than or equal to 9 12
> 9 less than of equal to 12 4
TOTAL 40Fill in the gaps in the table above.
The variables in the table are DISCRETE/ CONTINUOUS
The arithmetic mean of data =When i calculate, my midpoints are eg 1.5 etc., hence the variables are continuous
But the answer in the book are rounding the mid point eg 2 so their variables are discrete.What should i do? They did not mention rounding in the question.
It is because the sales each day here must be whole numbers.
So > 0 and less than or equal to 3 means that they must have sold 1, 2, or 3. So the mid-point is 2.
Similarly, > 3 less than or equal to 6 means that they must have sold 4, 5, or 6. So the mid-point is 5.
I would not worry about this for the exam.
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