The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?

## Probability of a player weighingThe probability of a player weighing more than 241.25 pounds on a team with the mean weight of 200 pounds and a standard deviation of 25 pounds is ?? |

## Sample size when increasing the confidence levelComparing the results from (a) and (e), what happens to the required sample size when we increase the confidence level? |

## Difference between paramaeter and statisticsCritically the difference between Paramaeter and Statistics and Critically discuss the concept of operationalize? What are focus groups |

## Coefficient of variation and standard deviationCountry A and Country C spends about the same amount on average per person per year. Which has the greater spread? |

## Understand the height of a california redwood treeAny person who is familiar with these trees understand the height of a California redwood tree which is related to another characteristics of the tree. |

## Test whether the mean weight is lessCompute the value of t. What is your decision regarding the null hypothesis? |

## The rules of probabilityWhich of the following models satisfies the rules of probability and The event corresponding to the above system functioning properly during one period of operation is |

## Estimating the value of probability by binomial distributionWhat's the probability that among three randomly selected high school students |

## Test whether the average cycle of sleeping and wakingTest whether the average cycle of sleeping and waking differs significantly from 24 hours. |

## Determining mutually exclusive information from abstractFollowing is based on information from Statistical abstract of the United States, Dec, 1992. Are A and B mutually exclusive? |

## Find probability with the cardsAn experiment consists of selecting a card at random from a 52-card deck. Refer to this experiment and find the probability of the event. |

## Average annual salary for a worker in united statesSuppose that the average annual salary for a worker in the United States is $30,000 and that annual salaries for Americans are normally distributed with a standard deviation equal to $7,000. Determine the following: |

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