Coloured and white beads were carefully selected for equality of size and shape. Equal quantities of each colour were then placed in a container. Randomly select enough beads to fill the cover of a petri dish. Count the number of beads of each colour and record your data in table 1.6
Coloured and white beads were carefully selected for equality of size and shape. Equal quantities of each colour were then placed in a container. Randomly select enough beads to fill the cover of a petri dish. Count the number of beads of each colour and record your data in table 1.6. Then calculate the expected numbers based on the sample size and the known ratio of white to coloured beads. Complete the table and calculate 32.
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Table 1.6 Chi-Square Calculations for Colored And White Beads |
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O |
E |
(O-E) |
(O-E)2 |
(O-E)2/E |
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Colored |
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White |
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Totals |
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How many degrees of freedom are there?
Using table 1.5, what 32 values lie on either side of your calculated 32 value?
What are the probability values associated with the 32 values?
Briefly interpret the 32 value you have just calculated.
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