Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Empirical and zscore

### Review 1 for test 3

Question | Answer |
---|---|

68% of the data lies within how many standard deviations about the mean? | one standard deviation |

What percentage of data is within 2 standard deviations of the mean for a normal distribution | 95% |

For a normal distribution with mean 100 and standard deviation 15, that value is 2 standard deviations more than the mean? | 130 |

For a normal distribution with mean 85 and standard deviation 15, What is the lower and upper value that captures approximately 68% of the data about the mean? | 70 to 100 |

What is the percentage area between the mean and the z score value of 2.4 for the standard normal distribution? | 49.18% |

What is the percentage area to the right of the z score value of 2.4 for the standard normal distribution? | 0.82% |

What is the percentage area to the left of the z score value of 2.4 for the standard normal distribution? | 99.18% |

What is the z score on a standard normal curve that has 2.5% of the area to its right? | z = 1.96 |

What is the z score on a standard normal curve that has 33% of the area to its left? | z = - 0.44 |

What is the probability that the z score will be less than -1.64? | 0.0505 (or 5.05% chance that the z score will be less than -1.64) |

Created by:
kkamran