Calculate the margin of error and sample mean for a confidence interval of (1,9)

Interval Size = 9 - 1

Interval Size = 8

Margin of Error = | ±Interval Size |

2 |

Margin of Error = | ±8 |

2 |

Margin of Error =

The sample mean is just the midpoint of the confidence interval

Sample Mean x = | Interval Size |

2 |

Sample Mean x = | 9 + 1 |

2 |

Sample Mean x = | 10 |

2 |

Sample Mean x =