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Binomial & Poisson Probabilities

Saturday, 18 March 2017 by

Two percent of the parts from a production process are defective. A sample of five parts from the production process is selected. What is the probability that the sample contains exactly two defective parts? Four percent of the customers of a mortgage company default on their payments. A sample of five customers is selected. What

Define the following events

Saturday, 18 March 2017 by

Also, please see the formula sheet and standard normal distribution table to be used. Only use a scientific or graphing calculator (Excel does not help me) and please show all working out. Question 5 A random sample of 1000 voters was cross-classified according to income level and the political party they plan to vote for

Probability

Saturday, 18 March 2017 by

Please see the formula sheet and standard normal distribution table to be used. Only use a scientific or graphing calculator (Excel does not help me) and please show all working out. Question 8 A recent study showed that 75% of all people over 60 years of age wear eye glasses. If a random sample of

Statistics

Friday, 17 March 2017 by

Talk Time on a Cell Phone: Suppose the ‘talk time’ in digital mode on a Motorola Timeport P8160 is normally distributed with mean 324 minutes and standard deviation 24 minutes. (a) What percent of the time will a fully charged battery last at least 330 minutes? (b) What is the probability that a random sample

Multiple Probability Problems

Friday, 17 March 2017 by

1. In a certain location of downtown Baltimore, it costs $7 per day to park at parking lots. An illegally parked car, if caught, will be fined $25, and the chance of being caught is 60%. If money is the only concern of a citizen who must park in this location, should he park at

The Republican party is interested in studying the number of Republicans that might vote in a particular Congressional district. Assume that the number of voters is binomially distributed by party affiliation (either Republican or not Republican). If ten people show up at the polls, determine the following: Binomial distribution 10 n 0.5 p X P(X)

The following table gives the median incomes of families by level of income and geographical region. East South Midwest West Totals < $80,000/year 102 98 39 62 301 $80,000 to less than $250,000/year 263 514 120 351 1248 $250,000/year Or more 100 226 65 99 490 Totals 465 838 224 512 2039 (A) Referring to

Discrete Probability Distribution

Friday, 17 March 2017 by

A company is interested in evaluating its current inspection procedure on shipments of 20 identical items. They take a sample of 5 and accept the shipment if no more than the allowed maximum of the samples are found to be defective. Those that do not pass are directed back to the vendor. What proportion of

14 Statistics Problems

Friday, 17 March 2017 by

4.7 If you roll a die 40 times and 9 of the rolls result in a “5,” what empirical probability was observed for the event “5”? 4.10 Webster Aquatic Center offers various levels of swimming lessons year-round. The March 2005 Monday and Wednesday evening lessons included instructions from Water Babies through Adults. The number in

What is the probability

Friday, 17 March 2017 by

Please help with the following problem. Medical studies have shown that 10 out of 100 adults have heart disease. When a person with heart disease is given an EKG test, a 0.9 probability exists that the test will indicate the presence of heart disease. When a person without heart disease is given an EKG test,

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