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 1. In a large metropolitan area, past records revealed that 30 percent of all the high school graduates go to college. Each student's choice to go to college is independent. From 20 graduates selected at random, what is the probability that exactly 8 will go to college?Question 2. A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution.What is the probability that on a randomly selected day she will have two messages? Question 3. The time to fly between New York City and Chicago is normally distributed with a mean of 140 minutes and a standard deviation of 15 minutes. What is the z-score that corresponds to a random variable X outcome of 150 minutes?Question 4. The time to fly between New York City and Chicago is normally distributed with a mean of 140 minutes and a standard deviation of 15 minutes. What is the probability that a flight is less than 135 minutes?Question 5. The time to fly between New York City and Chicago is normally distributed with a mean of 140 minutes and a standard deviation of 15 minutes. What is the probability that a flight is more than 160 minutes?Question 6. The time to fly between New York City and Chicago is normally distributed with a mean of 140 minutes and a standard deviation of 15 minutes. What is the probability that a flight takes between 140 and 160 minutes?Question 7. The time to fly between New York City and Chicago is normally distributed with a mean of 140 minutes and a standard deviation of 15 minutes. What is the probability that a flight takes less than 140 minutes or greater than 160 minutes?Question 8. After arriving at the university student medical clinic, the waiting times to receive service after checking-in follow an exponential distribution with a mean of 10 minutes. Calculate the probability a student waits more than 12 minutes. Question 9. The American Auto Association reports the mean price per gallon of regular gasoline is $3.10 with a population standard deviation of $0.20. Assume a random sample of 16 gasoline stations is selected and their mean cost for regular gasoline is computed.What is the probability that the sample mean is between $2.98 and $3.12? Question 10. The American Auto Association reports the mean price per gallon of regular gasoline is $3.10 with a population standard deviation of $0.20. Assume a random sample of 16 gasoline stations is selected and their mean cost for regular gasoline is computed.What is the probability that the sample mean is greater than $3.08?Question 11. The American Auto Association reports the mean price per gallon of regular gasoline is $3.10 with a population standard deviation of $0.20. Assume a random sample of 16 gasoline stations is selected and their mean cost for regular gasoline is computed.95% of the sample means fall within what two limits?Question 12. LongLast Inc. produces car batteries. The mean life of these batteries is 60 months. The distribution of the battery life closely follows the normal probability distribution with a standard deviation of 8 months. As a part of its testing program, LongLast tests a sample of 25 batteries.What percentage of the samples will have a mean useful life less than 56 months? Question 13. A population consists of the following four values: 8, 10, 12, and 16. From this population, there are 6 different samples of size 2. The means of the 6 samples of size 2 are: 9, 10, 12, 11, 13, and 14. Compute the mean of the distribution of the sample means and the population mean.Compare the two values. What is true about the two values?Question 14. A research firm conducted a survey to determine the mean amount people spend at a popular coffee shop during a week. They found the amounts spent per week followed a normal distribution with a population standard deviation of $4. A sample of 64 customers revealed that the mean is $25.What is the 99.6% confidence interval estimate of µ? (Be sure to calculate the actual confidence interval end points / limits in real dollars).Question 15. A local health care company wants to estimate the mean weekly elder day care cost. A sample of 10 facilities shows a sample mean of $250 per week with a SAMPLE standard deviation of $25.What is the 95% confidence interval for the population mean? (Be sure to calculate the actual confidence interval end points / limits in real dollars).Question 16. A population is estimated to have a standard deviation of 25. We want to estimate the population mean within 2, with a 95% level of confidence.How large of a sample is required? Question 17. A silkscreen printing company purchases t-shirts. To ensure the quality of the shipment, 300 t-shirts are randomly selected. 15 are defective.What is the 95% confidence interval for the proportion defective?
Explain how the marketing analyst can use independent samples to collect the data.
Jared bets on the number 7 for each of 100 spins of a roulette wheel. Because P(7) = 1/38 he expects to win two or three times. What is the probability that Jared will actually win two or more times?
Define probability and explain the three perspectives. Provide an example of each. Describe the difference between subjective and probabilistic sampling methods. What are the advantages and disadvantages of each?
Lets say a business has account receivables per customer of $60.54. There was a random sampling of 19 accounts that revealed a sample mean of $73.55 and a sample standard deviation of $19.29.
Compute the expected return and standard deviation of each of the two securities. Assume Miss Maple invested $2,500 in Security A and $3,500 in security B. Calculate the expected return and standard deviation for her portfolio.
Assume a normal distribution applies and alpha = 0.05 (Use Z table), find the Critical value for the alternative hypothesis:
Testing for population mean - warp-breaking specification of the manufacturer at the .05 level of significance?
The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,325. The distribution of pages printed per cartridge closely follows the normal probability distribution and the standard d..
Construct a 90% two-sided confidence interval onthe difference between the proportion nonconforming in processes 1 and 2. Based on this confidence interval, can you conclude at a significance level of 10% that the difference is not equal to 10%? W..
Island Water Sports is a business that provides rental equipment and instruction for a variety of water sports in a resort town. On one particular morning, a decision must be made of how many Wildlife Raft Trips and how many Group Sailing Lessons ..
Consider in you response how the concepts of a population (and its associated parameters) and the sample (and its associated estimates) fits into the discussion.
What is a prime number, and why are prime numbers important? What do you call a number that is not prime? What is the largest prime number ever found?
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