Question

We have the survey data on the body mass index (BMI) of 659 young women. The mean BMI in the sample was x¯=25.5. We treated these data as an SRS from a Normally distributed population with standard deviation σ=7.8 .

Give confidence intervals for the mean BMI and the margins of error for 90%, 95%, and 99% confidence.

Answer #1

Hello Sir/ Mam

Given that:

Mean | 25.5 |

n | 659 |

SD | 7.80 |

90% Confidence Interval

95% Confidence Interval

99% Confidence Interval

Also, Margin of errors:

CI | MOE |

90% | 0.4998 |

95% | 0.5955 |

99% | 0.7827 |

I hope this solves your doubt.

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