Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Question: Let X be the number of purchases that Fred will make on the online site for a certain company (in some specified time period). Suppose that the PMF of X is P(X = k) = e-λ/k! for k = 0, 1, 2,... . This distribution is called the Poisson distribution with parameter , and it will be studied extensively in later chapters.
(a) Find P(X ≥ 1) and P(X ≥ 2) without summing infinite series.
(b) Suppose that the company only knows about people who have made at least one purchase on their site (a user sets up an account to make a purchase, but someone who has never made a purchase there doesn't appear in the customer database). If the company computes the number of purchases for everyone in their database, then these data are draws from the conditional distribution of the number of purchases, given that at least one purchase is made. Find the conditional PMF of X given X ≥ 1. (This conditional distribution is called a truncated Poisson distribution.)
suppose we are comparing the variability in healthcare costs from one state to another in the us. for state 1 the
Suppose that a claim is made that the average billionaire is 60 years old or younger.The following is a random sample of billionaires. Conduct the test using the 0.05 level of significance.
a security analyst wishes to construct an index to reflect the changes in the price of five stocks in a certain
Find out and interpret coefficients of correlation and determination for U. S. prices versus Canadian prices.
At a successful garage, there is always a backlog of cars waiting to be serviced. The service times of cars are iid exponential random variables with a mean service time of 30 minutes. Find the PMF of N(t), the number of cars serviced in the first..
What is a point estimate for the population mean µ?
Find an article that incorporates research of confidence intervals to market a new product. Summarize the information gained from your research
a random sample of 44 unlv students is taken. the average age in the sample was 20.2 years with a standard deviation of
The United States Postal Service reports that 95 percent of first class mail within the same city is delivered within two days of the time of mailing. Six of the letters are randomly sent to different locations.
Which class had the highest mean score?- Which class had the highest median score?- For which class are the mean and median most different? Which is higher? Why?
A person must score in the upper 2% of the population on an IQ test to qualify for member ship in Mensa, the international high-IQ society. If IQ scores are normally distributes with a mean of 100 and a standard deviation of 15, what score must a ..
According to TNS Intersearch, 69% of wireless web users use it primarily for receiving and sending e-mail. Suppose that three wireless web users are selected at random. What is the probability that all of them use it primarily for e-mail?
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd