**Part I. Nominal level data section**

Engrade administrative module has a dashboard that reports on the performance levels for 340 of the students in 19 courses using Engrade. The following data comes from that dashboard.

Performance level | Number of students |
---|---|

Succeeding | 116 |

Struggling | 111 |

Failing | 113 |

- n = __________ What is the sample size n?
- mode = ____________________ What is the mode?

**Part II. Ratio level data section**

Data in this section is the number of seconds for swimmers to swim the length of the pool in Nan Pepper on afternoon.

lap time (s) |
---|

52 |

51 |

51 |

51 |

55 |

48 |

48 |

46 |

76 |

66 |

70 |

73 |

66 |

59 |

56 |

49 |

- n= __________ Calculate the sample size n.
- Q0 = __________ Calculate the minimum (zeroth quartile).
- Q1 = __________ Calculate the first quartile.
- Q2 = __________ Calculate the median (second quartile).
- Q3 = __________ Calculate the third quartile.
- Q4 = __________ Calculate the maximum (fourth quartile).
- IQR = __________ Calculate the Inter-Quartile Range.
- Make a sketch of the box plot for this time data.
- x = __________ Calculate the sample mean x.
- mode = __________ Calculate the mode.
- sx = __________ Calculate the sample standard deviation sx.
- CV = __________ Calculate the sample coeficient of variation CV.
- z = __________ Calculate the z-score for 76 seconds.
- range = __________ Calculate the range.
- width = __________ If the time data is divided into
**five**classes, what is the width of a single class? -
Determine the frequency and calculate the relative frequency for the data.
Record your results in the table provided.

Class upper limits Frequency F Rel. Freq. **Sums:** -
Sketch a
**frequency**histogram for the data, labeling your horizontal axis and vertical axis as appropriate. - What is the shape of the histogram?