A researcher must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:

79.5 |

71.1 |

62.2 |

99.7 |

60 |

81.8 |

73.8 |

83.5 |

63 |

Assuming the population of temperatures are normally distributed, find the 90% confidence interval. *Round the answers to two decimal places. Enter your answer as an interval of the form* (LB,UP).

The researcher is 90% confident that the population average temperature is within the temperature interval .