**Question: **

1 A municipal bond service in the US has three rating categories (*A*, *B *and *C*). Suppose that of the total number of municipal bonds issued in the past year, 70% were rated *A*, 20% were rated *B *and 10% were rated *C*. Of the bonds rated *A*, 50% were issued by cities, 40% by suburbs and 10% by rural areas. Of the bonds rated *B*, 60% were issued by cities, 20% by suburbs and 20% by rural areas. Of the bonds rated *C*, 90% were issued by cities, 5% by suburbs and 5% by rural areas.

2 If a new bond is to be issued by a city, what is the probability that it will receives an *A *rating?

3. What proportion of municipal bonds is issued by suburbs?

4. Unisys.com is one of the most frequented business-to-business web sites. According to a Wall Street Journal article, business partners accessing Unisys.com spend an average of 65.7 minutes, possibly the longest average time per visit of any business-to-business Web site. Assuming that the duration of a visit to this Website is normally distributed with a mean of 65.7 minutes and a standard deviation of 15 minutes.

5. What is the probability that a randomly selected visit will last between 60 and 90 minutes?

6. Less than how many minutes will only 20% of the visits last? (4) 2.2.3 Between what values, symmetrically distributed around the mean will 90% of visits last?

Define what is the ph of the solution after the addition : If 25.00 mL of 0.200 M HCl is titrated with 0.200 M NaOH, what is the pH of the solution after the addition of 22.50 mL of NaOH |

How much work did the person do : In the Biomedical and Physical Sciences building at MSU there are 127 steps from the ground floor to the sixth floor. How much work did the person do |

What is the capitalized worth per year starting in year one : what is the capitalized worth, at i=10%, of $1,500 per year starting in year one and continuing forever, and $10,000 in year five, repeating every four years thereafter, and continuing ad infinitum (i.e. forever ) |

Explain what volume of a concentrated solution of naoh : What volume (mL) of a concentrated solution of NaOH (6.00 M) must be diluted to 200. mL to make a 0.88 M NaOH solution |

What proportion of municipal bonds is issued : What 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? |

The parable of the talents from the book of matthew : A question of Money ! To an economist, money is merely a medium of exchange. To some people, however, money is a God; and to others, money is evil. But in the Scriptures of the New Testament, Jesus teaches us about money. What do you learn about mone.. |

Which has subsidized the production of cheap and nutritional : Corporations such as McDonalds may be partially responsible for health issues such as obesity, but how much of the responsibility goes to the US Dept. of Agriculture, which has subsidized the production of cheap and nutritionally empty foods |

Explain what mass of aluminum metal can be produced : What mass of aluminum metal can be produced per hour in the electrolysis of a molten aluminum salt by a current of 20 A. Express your answer using two significant figures. |

Find the height of the table top above the floor : A physics book slides off a horizontal table top with a speed of 1.00m/s. It strikes the floor after a time of 0.390ss, Find the height of the table top above the floor |

## List the equally likely outcomesBolts are randomly selected until a 5 mm bolt is obtained. The outcomes are the sequences of bolts that can be selected. So one outcome is 1, and the other is 342. List the equally likely outcomes. |

## Percentage of the averages or mediansWhat percentage of the averages or medians of the sample will be greater than 140 seconds? |

## Information about hypothesis problemA recent national survey found that high school students watched an average (mean) of 6.8 videos per month. A random sample of 36 college students revealed that the mean number of videos watched last month was 6.2 |

## Scatterplot to determine what kind of relationshipMake a scatterplot to determine what kind of relationship there seems to be between the two variables. Use the percent of lead removed as the response variable. |

## Mean and standard deviation of average payoutThe law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable-one three digit number wins $600 and all others win nothing-that gamblers never reach "the long run". |

## Probability that a randomly selected person sleeps moreAccording to the Sleep Foundation, the average night's sleep is 6.8 hours. Assume the standard deviation is 0.6 hours and the probability distribution is normal. a. What is the probability that a randomly selected person sleeps more than 8 hours? |

## Estimate the mean time workers who are employedA sample of 15 workers revealed the following number of minutes traveled. Develop a 98 percent confidence interval for the population mean. Interpret the result. Please explain how you calculate. |

## Write some features of normal distribution p.d.f. curveWrite down some features of the Normal distribution p.d.f. Curve. (c) 6. What are the parameters of the Normal distribution? |

## Mean life for shipment of lightbulbsThe quality-control manager at a light bulb factory needs to determine whether the mean life of a large shipment of light bulbs is equal to 375 hours. The population standard deviation is 100 hours. |

## Explaining if supposition of independence be violatedDetermine the probability of fatal accident over a lifetime? Describe your reasoning carefully. Hint: Suppose independent events. Why might the supposition of independence be violated? |

## Construct a frequency distribution table for dataconstruct a frequency distribution table for these data. what type of graph would be appropriate to show the frequency distribution for these data? |

## Testing for equality of variancesTesting for equality of variances - Independent random samples were taken from normal distributions of the yearly production of ships built by the International Ship Building Company under |

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd