Compute the mean and variance of y

Assignment Help Basic Statistics

Reference no: EM131853770

1. It is believed that 20% of voters in a certain city favor a tax increase for improved schools. If this percentage is correct, what is the probability that in a sample of 250 voters 60 or more will favor the tax increase? (Use the normal approximation.)

2. The probabilities for a random variable having the Poisson distribution with μ = 1 is given in the following table.

978_probabilities for a random variable.png

Note: Probabilities for Y > 6 are very small and may be ignored.

(a) Compute the mean and variance of Y.

(b) According to theory, both the mean and the variance of the Poisson distribution are μ. Do the results in part (a) agree with the theory?

Reference no: EM131853770

Questions Cloud

Determining the binomial distribution : 1. The binomial distribution for p = 0.2 and n = 5 is: (a) Compute µ and s2 for this distribution.

Compute the probability of failure : A system requires two components, A and B, to both work before the system will. Because of the sensitivity of the system, an increased reliability is needed

How mankiws principles are foundational to issues discussed : Identify and describe how Mankiw's 10 Principles are foundational to the issues discussed in the article/video.

What percent of students failed the test : (a) If a score below 60 represents a grade of F (failure), approximately what percent of students failed the test?

Compute the mean and variance of y : Note: Probabilities for Y > 6 are very small and may be ignored. (a) Compute the mean and variance of Y.

Identify at least four different stakeholders : Identify at least 4 different stakeholders; for each, list at least 2 things that the stakeholder requires in order to deem the project successful.

Mean number of phone calls : Using this approximation, determine how many telephone operators are needed to ensure at most 5% busy signals if the mean number of phone

Calculate the amount of money that will have accrued : FINC 610 Assignment - Time Value of Money. Calculate the amount of money that will have accrued if he leaves the money in the bank

Find approximate binomial probabilities : The Poisson distribution may also be used to find approximate binomial probabilities when nis large and p is small, by letting µ be np.

User Account

All Pages