Question

In the population below. What is the prevalence of hypertension among those who are not obese? Hypertension No Hypertension Total Obese 8254 1120 9374 Not Obese 3152 6374 9526 Total 11406 7494 18900

Answer #1

H0: There is no association between prevalence of hypertension among those who are not obese

H1: There is association between prevalence of hypertension among those who are not obese

Let the los be alpha = 5%

The expected frequencies are

Obsese | ||||

A | C | M | Total | |

Hypertension | 5657.135 | 3716.865 | 9374 | 18748 |

No Hypertension | 5748.865 | 3777.135 | 9526 | 19052 |

Total | 11406 | 7494 | 18900 | 37800 |

The chisquare contribution values are

Oi | Ei | (Oi-Ei)^2 /Ei |

8254 | 5657.135 | 1192.0712 |

1120 | 3716.865 | 1814.3537 |

9374 | 9374 | 0 |

3152 | 5748.865 | 1173.0503 |

6374 | 3777.135 | 1785.4029 |

9526 | 9526 | 0 |

Total: | 5964.8781 |

Degrees of freedom: 2

Test Statistic, X^2: 5964.8800

Critical X^2: 5.991471

P-Value: 0.0000

Here p-value < alpha 0.05 so we reject H0

Thus we conclude that There is association between prevalence of hypertension among those who are not obese

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