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!
1. Test at α =.05 and 0.10 the hypothesis that a majority (more than 50%) of students favor the plus/minus grading system at a university if in a random sample of 500 students, 265 favor the system?
2. Test whether the sample evidence indicates that the average time an employee stays with a company in their current positions is less than 3 years when a random sample of 64 employees yielded a mean of 2.76 years and s = 0.8. Use a = 0.01. Assume normal distribution.
Discuss and give examples of three methods that are used in marketing research for determining sample size.
given the following data setx 1 3 7 9 13 15y 1 5 8 10 11 13a. find the correlation coefficient.b. using this to predict
Polls showed the two main candidates in 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has a margin of error of less than 1%.
An aircraft company is considering using a new light-weight fastener, called the Superlight, to rivet certain sheet metal parts together.
Test whether there is any change in IQ after the training program. (The absolute value of t for 4 degrees of freedom at 1% level for one-tailed and two tailed tests are 3.747 and 4.604 respectively.
1. You and your friend decide to get your cars inspected. You are informed that 75% of cars pass inspection. If the event of your car's passing is independent of your friend's car, a) What is the probability that your car passes inspection?
Confidence intervals and sample size, part 2. A confidence interval for the price of gasoline from a random sample of 30 gas stations in a region gives the following statistics:
Repeating this experiment many times with different samples, what values for the sample means would be possible? What values would repeat more often?
In this American Cancer Society study, the risk (probability) of dying of lung cancer was about the same as for those who had never smoked.
Tell whether the following pairs of questions are open or closed.
If you have a choice between two estimates, the sample mean from a sample of size 5 and a sample mean from a sample of size 10, which one would generally give a "better" estimate? Clearly state your definition of "better."
What is meant by Econometrics, Regression analysis and Disturbance or error term?
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