If I have a set of values(direct measurements of dynamic deformations of a road at 100m) between 3 and~1000, how can I calculate the 2 characteristical values wich limits the interval including 85,95% of all possible measurements on this road? Using stdev and t-Student, the lower value results negative if some values are too high(all values & results MUST be positives).

If the aberant values are the problem how to analyse the dataset to check wich values to reject?

## Test hypotheses and sample size requirementA study was conducted to estimate the mean amount spent on birthday gifts for a typical family having two children. A sample of 150 was taken, and the mean amount spent was $225. |

## Finding median if distribution of data is extremely skewedMedian can be a more suitable measure of central tendency than mean if distribution of data is extremely skewed. |

## Five-step process for calculating probabilitiesWhat are the five steps for calculating probabilities of events? Please apply these steps to an example. |

## Find the moment of inertia of the wheelInitially the wheel rotates with an angular speed W, causing the block to rise with a linear speed v = 0.33 m/s. Find the moment of inertia of the wheel if the block rises to a height of = 7.9 before momentarily coming to rest. |

## Explain which three measures of central tendencyAlso explain which of the three measures of central tendency would be appropriate for your example, which would be inappropriate, and why. |

## The length of country and western songs is normallyThe length of country and western songs is normally distributed and has a mean of of 170 seconds with a standard deviation of 49 seconds. find the probabality that a random collection of 16 songs will have a mean of 158.30 seconds or less? |

## Compute binomial probability distributionFind the probability that when 236 reservations are accepted for Flight 179, there are more passengers showing up than there are seats available. |

## Chi square test of independence and z testA researcher is interested in studying the relationship between certain driving habits and type of vehicle. He hypothesizes that signaling behavior will be different for drivers of trucks and cars. |

## Make forecast using a trend model-fit several trend modelsMake a forecast for 2005, using a trend model of your choice or a judgment forecast. Discuss. Note: Time increments are 5 years, so use t = 6 for your 2005 forecast. |

## What proportion of municipal bonds is issuedWhat proportion of municipal bonds is issued by suburbs and What is the probability that a randomly selected visit will last between 60 and 90 minutes? |

## Students speak the same mean number of wordsAssume that two samples are independent simple random samples selected from normally distributed populations. Use a 0.05 significance level to test the claim that male and female biology students speak the same mean number of words in a day. |

## Drawing the sample of church membersFor a regional survey of suburban households to obtain data on television viewing habits, a statistical sample of suburban areas is first selected. Within the chosen areas, statistical samples of whole blocks are selected; and within the selected.. |

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