Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced was 345, with a standard deviation of 21. A sample of 60 afternoon-shift workers showed that the mean number of units produced was 351, with a standard deviation of 28 units. At the .05 significance level, is the number of units produced on the afternoon shift larger?

## Probability of project completion time using pertWhat is the probability that the project will be completed in 17 months or less? |

## Student population has remained constant during this periodDevelop an appropriate forecast model for the given problem whereas the student population has remained constant during this period. |

## Correlation in the populationA random sample of 15 paired observations has a correlation of -.46. Can we conclude that the correlation in the population is less than zero? Use the .05 significance level. |

## Computing probability to receive email during same periodWhat is the probability she received 5 or more email during the same period? |

## Finding sample correlation coefficients age with dry weightFind out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results. |

## Accessing link support in circuit switchingIf circuit switching is utilized, how many user can this access link support? |

## Conduct a marketing experimentConduct a marketing experiment in which students are to taste one of two different brands of soft drink |

## Computing probability of debt for randomly selected borrowerCompute the probability that debt for a randomly selected borrower with good credit is more than $18,000? |

## Calculating confidence intervalCalculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. |

## Normally distributed population meanIf 50 cups of coffee were measured, what is the probability that: The sample mean per cup is less than 7.8 ounces? |

## Advantages of using ancovaThe analysis of covariance (ANCOVA) is generally useful for _______________ |

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