Determine the mean and standard deviation, Basic Statistics

1.)  Two dice are rolled and the sum is calculated.  Let X represent the sum of the two dice. Construct a probability distribution expressing probabilities in fractional form.

2.)  Find the mean and standard deviation to 2 decimal places for problem #1.

3.)  On the basis of past experience an insurance salesperson knows that the number of long-term health care insurance policies sold per week by the company is a random variable x with the following probability distribution.

            X                     p(x)

            0                      0.245

            1                      0.143

            2                      0.125

            3                      0.096

            4                      0.078

            5                      0.064

            6                      0.039

            7                      0.029

            8                      0.181

Suppose that a week is randomly selected. Find

a.)  p(x=3)       b.) p(x > 4)         c.) p(x < 8) d.) p(1 < x < 6)

4.)  A question on a proficiency test is multiple choices with five possible answers, one of which is correct.  Assuming that all responses are random guesses, find the probability that among 18 test subjects,

a.) exactly 5 answer the question correctly.

b.)  at most 6 answer the question correctly.

c.)  at least 8 answer the question correctly.

5.)  Referring back to question 4, find the mean to the nearest hundredth and the standard deviation to four decimal places.

Posted Date: 2/23/2013 12:43:21 AM | Location : United States

Related Discussions:- Determine the mean and standard deviation, Assignment Help, Ask Question on Determine the mean and standard deviation, Get Answer, Expert's Help, Determine the mean and standard deviation Discussions

Write discussion on Determine the mean and standard deviation
Your posts are moderated
Related Questions
Define Average Speed in Various Cases (a) Particles covering different distances in different times say a particle covers s1 distance in time t1 ,s2 in time t2, s3 in time t3 and

What is it that created the numerical relationship between a chi square test and a z test?

Q. Example of inference? Ans. Thirty students from a college were surveyed and classified according to two variables: (1) gender (M/F) and (2) major (liberal arts, busines

a business was started on January 1, 2011 and $1000 of supplies to use in the business. At the end of the month 25% of the supplies remains unpaid and 20% are still on hand. what a

meaning,definition,scope,origin,advantages and limitation of operation research ?

Define various methods in accounting, specifications and procedures.

Your company operates a machine shop, and, having heard you had experience in statistics and design of experiments, consulted you for your opinion on an experiment they want to run

Amortized cost The par value of its decision enhanced or lowered by any unamortized top quality or lower price.

Have Minitab run a multiple linear regression to predict the margin of victory using the four predictors (home team record, away team record, stat1diff, stat2diff). Store the resi

I have 8 problems that I need help with. I will need to upload the files. Thanks