1) If X is a Poisson distributed random variable with a mean of 3, and Y is another Poisson distributed random variable with a mean of 2, and the two are independent, what is the varianceof the sum X+Y?

2) If X is a random variable having a binomial distrubution with n=20 and p=.4, and Y is transformed version of X, where Y=2X+3, what is the expected value of Y?

Bob a manufacturing plant manager is inspecting the : bob a manufacturing plant manager is inspecting the diameters of ball bearings produced by a suspected malfunctioning |

Bob a manufacturing plant manager is inspecting the : bob a manufacturing plant manager is inspecting the diameters of ball bearings produced by a suspected malfunctioning |

The lifespan of an electrical component is assumed to be : the lifespan of an electrical component is assumed to be normally distributed with an average life of 6 years and a |

What is the expectation of the random variable w xy4 what : suppose that two random variables x and y have a joint density function given by fxy and by checking we find that fxy |

If x is a poisson distributed random variable with a mean : 1 if x is a poisson distributed random variable with a mean of 3 and y is another poisson distributed random variable |

In a sequence of 10 independent bernoulli trials where the : 1 in a sequence of 10 independent bernoulli trials where the probability of success is .4 what is the expected number |

Calculate the mean variance and standard deviation of the : the national sporting goods association nsga conducted a survey of the ages of individuals that purchased skateboarding |

The diameters of a new species of apple have a bell-shaped : the diameters of a new species of apple have a bell-shaped distribution with a mean of 7.26cm and a standard deviation |

The prices of a gallon of milk at various stores in one : the prices of a gallon of milk at various stores in one town have a mean of 3.86 with a standard deviation of 0.13. |

## Hypothesis testing on maintence costAn Electric Co. Operates a fleet of trucks that provide electrical service to the construction industry. Monthly mean maintenance cost has been $75 per truck. |

## Relationship between correlation and causationWhat is correlation? Does correlation directly support causation, what are both sides of the argument? |

## What is expected value of a two point shotIf the probability of making a two point shot is greater than the probability of making a three point shot, why do coaches allow some players to shoot the three point shot if they have the opportunity? Use expected value to explain your answer. |

## Find the value of test statistic for average total weightSuppose that a random sample of 51 passengers showed an average total weight of 200 pounds with a sample standard deviation of 59.5 pounds. What is the value of the test statistic? |

## Shape of distribution of sample mean for cd-s sold by craThe normal distribution witha population standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CD's sold by CRA CD's Inc.? |

## Standard deviation for difference in heights for each pairIf a male soldier and female soldier are paired up what will be the mean and standard deviation for the difference in heights for each possible pair? |

## Confidence interval for true mean total cholesterol levelsCholesterol levels are measured as followed: 185 225 240 196 175 180 194 147 223. Generate a 95% confidence interval for the true mean total cholesterol levels in children? |

## Binomial distribution-academic approachConsider a binomial distribution with 15 identical trials, and a probability of success of 0.5. Find the probability that x = 2 using the binomial tables |

## Time series and forecastingVictor Anderson, the owner of Anderson Belts, Inc., is studying absenteeism among his employees. His workforce is small, consisting of only five employees. |

## Some plastic rods are automatically cut into lengths of 6some plastic rods are automatically cut into lengths of 6 in. actual lengths are normally distributed about a mean of 6 |

## In the 2012 us census the four most populous states ca txin the 2012 us census the four most populous states ca tx ny fl had 12.1 8.1 6.3 and 6.1 of the total us population. |

## Determine the test value for hypothesisThe dean of students believes that teh costs are greater this semester. What is the test value for this hypothesis? |

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