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: Several online textbook retailers advertise that they have lower prices than on-campus bookstores. However, an important factor is whether the Internet retailers actually have the textbooks that students need in stock. Students need to be able to get textbooks promptly at the beginning of the college term. If the book is not available, then a student would not be able to get the textbook at all, or might get a delayed delivery if the book is back ordered. A college newspaper reporter is investigating textbook availability at online retailers. He decides to investigate one textbook for each of the following seven subjects: calculus, biology, chemistry, physics, statistics, geology, and general engineering.
He consults textbook industry sales data and selects the most popular nationally used textbook in each of these subjects. He visits websites for a random sample of major online textbook sellers and looks up each of these seven textbooks to see if they are available in stock for quick delivery through these retailers. Based on his investigation, he writes an article in which he draws conclusions about the overall availability of all college textbooks through online textbook retailers. Write an analysis of his study that addresses the following issues: Is his sample representative of the population of all college textbooks? Explain why or why not. Describe some possible sources of bias in this study, and how it might affect the results of the study. Give some suggestions about what could be done to improve the study.
The following data represent the cost of electricity for the period of July 2008 for a random sample of 50 one-bedroom apartments in a large city.
let x be the number of successes in seven independent trials of a binomial experiment in which the probability of
suppose y1 through y21 is a random sample from the population with the following density function fy 3y2theta3 0 is
What is a nonparametric test and what is a parametric test - If the Kruskal-Wallis test is to be used with the data in the above exercise, the samples should be simple random samples. What is a simple random sample?
Most traffic lights are set so that there is enough time for pedestrians to cross the road safely. A recent study indicates that a large number of elderly cannot get across the road in the usual 15 seconds allowed.
After gaining an understanding from the video on secondary data, provide at least two public websites where we can get data for research. Here's one example. We can pull the unemployment rate for each state from the bureau of labor statistics. www..
Use the table to determine whether the correlations are significant and how you would interpret the results. The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a one-tailed test.
In previous tests, baseballs were dropped 24ft onto a concrete surface, and they bounced an average of 92.84% in. In a test of a sample of 40 new balls, the bounce had a mean of 92.67 in.
x is a normally distributed random variable with a standard deviation of 4.00. find the mean of x if 12.71 of the area
Let the random variable X denote a randomly chosen age group within the population. Find the probability distribution associated with these data.
What is the inherent meaning and justification of cross multiplication as it applies to solving an equality? Is | x -2 | the same as | 2 - x |? Please explain your answer. How do you express the following mathematically?
What is the Central Limit Theorem? How large should the sample size be if the underlying distribution of the population values are:
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