Question

In a given experiment on the effect of a food supplement of guinea pigs , two groups of guinea pigs that are pregnant and not pregnant were given equal amount of the food supplement and observed for five days. Out of the 200 that were pregnant 28 showed increase in weight while 13 out of 180 that were not pregnant did not show any sign of increase in weight Prepare a 2×2 contigency table for this information​

Answer 1

The resulting 2x2 contingency table is as follows:

| Increase in weight | No increase in weight |

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Pregnant | 28 | |

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Not Pregnant | | 13 |

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To prepare a 2x2 contingency table for this information, we need to consider the pregnant and not pregnant groups and their respective responses to the food supplement.

Let's set up the table:

| Increase in weight | No increase in weight |

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Pregnant | 28 | |

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Not Pregnant | | 13 |

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From the given information, we know that out of the 200 guinea pigs that were pregnant, 28 showed an increase in weight. Therefore, we fill in the corresponding cell in the table with the value 28.

Similarly, out of the 180 guinea pigs that were not pregnant, 13 did not show any sign of increase in weight. Hence, we fill in the corresponding cell with the value 13.

The resulting 2x2 contingency table is as follows:

| Increase in weight | No increase in weight |

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Pregnant | 28 | |

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Not Pregnant | | 13 |

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