**Question: **The supplier of a particular brand of vitamin pills claims that the average potency of these pills after a certain exposure to heat and humidity is at least 65 and from the prior knowledge the potency of these pills is known to be normally distributed. Before buying these pills, a distributor wants to check if the supplier’s claim is valid. To this end, the distributor will choose a random sample of 16 pills from a batch and measure their potency after the specified exposure. The results are: 63 72 64 69 59 65 66 64 65 73 69 60 71 68 65 62 Determine a 90% confidence interval for the true average potency of these pills after the specified exposure.

## Statistics: Testing Hypothesis – #29536

**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: **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 |