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1. Sam will read either one chapter of his probability book or one chapter of his history book. If the number of misprints in a chapter of his prob- ability book is Poisson distributed with mean 2 and if the number of misprints in his history chapter is Poisson distributed with mean 5, then assuming Sam is equally likely to choose either book, what is the expected number of misprints that Sam will come across?
2. A coin, having probability p of coming up heads, is to be successively ?ipped until the ?rst head appears. What is the expected number of ?ips required?
The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30 individuals with their age (X 1 ) and their gender (X 2 ) (0 if male and 1 if female).
f x has a normal distribution with mean µ=15 and standard deviation σ= 3, describe the distribution of x values for sample size n, where n = 4, n = 16, and n = 100. How do the x distributions compare for the various sample sizes?
A simple random sample of 30 repairs made by this company is taken. The sample average is $97, and the SD is $17. Assume that the repair cost has a normal curve.
construct fishers ideal index for the given information and check whether fishersformula satisfies time reversal and
PC World rated four component characteristics for 10 ultraportable laptop computers: features; performance; design; and price. Write down the estimated regression equation
A student applies for two different scholarships. The probability of receiving the first scholarship is 0.3 and the probability of receiving the second is 0.4. The decisions are made independently. Find the probability the student receives exactly..
A business has 5 telephone lines. The first rings every minute on the average, the second every ½ minute, the third every 2 minutes, the fourth every 5 minutes,
how would you go about selecting a particular level of significance icircplusmn to conduct a hypothesis test? provide
SmithCo is a supplier to many brand-name makers of mobile phones. SmithCo manufactures the external shells that enclose mobile phones. State the confidence interval in the form a ± b
Here is a simple probability model for multiple-choice tests. Assume that each student has probability p of correctly answering the question chosen at random from universe of possible questions.
Explain what these terms mean in describing the distribution of the sales reps' salaries.
a teacher gives a reading skills test to a third-grade class of n 25 at the beginning of the school year. to evaluate
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