**Question: ***With Normal distribution average µ = 50 and standard deviation \[\sigma =\] 12 *

*calculate probability that x is less than 44. Use z-value and Appendix Tables C or Excel function.*

**Question: **A medical student surveys adults to determine if gender and seat belt use are independent. Use the 5 steps of hypothesis testing to determine whether gender and seat belt use are independent.

Seat belt use | Gender M | F |

Belt | 70 | 60 |

No belt | 30 | 40 |

**Question: **A researcher collected daily sodium intake and systolic blood pressure readings on 12 patients. Obtain the regression equation from SPSS and include the table you used for the data. Use the 5 step hypothesis testing approach to determine if the regression equation is significant at alpha = 0.05. What would be a likely blood pressure for a person with a sodium intake of 6.3: 7.6?

Sodium | SBP |

6.8 | 154 |

7 | 167 |

6.9 | 162 |

7.2 | 175 |

7.3 | 190 |

7 | 158 |

7 | 166 |

7.5 | 195 |

7.3 | 189 |

7.1 | 186 |

6.5 | 148 |

6.4 | 140 |

**Question: **Two health inspectors rate 11 hospitals on cleanliness. Determine whether their rankings are comparable, using the appropriate nonparametric test and the 5 steps of hypothesis testing.

Inspector 1 | Inspector 2 |

2 3 2 3 1 4 5 3 1 3 4 | 1 3 3 2 2 5 4 2 1 4 3 |

**Question: **A medical informatics manager reviews sick day use in her department. She identifies that employees in her small department used the following amount of sick time in the past year:

Men: 5,10,2,0,6,4,5,15

Women: 8,9,3,5,0,4,15

The statistician indicated she should use a nonparametric test to determine if there is a difference in sick time use between the men and women in her department. Use the 5-step approach to hypothesis testing and alpha=0.05 to determine if there is a difference.

**Question: **Refer to the baseball dataset provided on the author's website.

Over the last 10 years, the mean attendance per team followed a normal distribution with a mean of 2.25 million per team and a standard deviation of .70 million.

o Use a statistical software to compute the mean attendance per team for the 2009 season.

o Determine the likelihood of a sample mean this large or larger from the population.

**Question: ** A recent study indicated that women took an average of 8.6 weeks of unpaid leave from their jobs after the birth of a child. Assume that this distribution follows the normal probability distribution with a standard deviation of 2.0 weeks. We select a sample of 35 women who recently returned to work after the birth of a child. What is the likelihood that the mean of this sample is at least 8.8 weeks?

Back to

log in