-
you want to estimate the mean SAT score for a population of students with a 90% confidence interval. Assume that the population standard deviation is 100. If you want the margin of error to be approximately 10, you will need a sample size of
-
need 200 words
-
10 professors approach elevator. use central limit theorem. mean weight is 190 pounds and standard deviation is 25 pounds
-
"10.50 At a large university, a mathematics placement exam is administered to all students. Samples of 36 male and 30 female students are randomly selected from this year's student body and the following scores are recorded: Male 72 68 75 82 81 60 75 85 80 70 71 84 68 85 82 80 54...
-
In developing patient appointment schedules, a medical center wants to estimate the mean time that a staff member spends with each patient. How large a sample should be taken if the desired margin of error is two minutes at a 95% level of confidence? How large a sample should be taken for a 99%...
-
The 2003 Statistical Abstract of the United States reported the percentage of people 18 year of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of .30. a. How large a sample should be...
-
Please work with me I have few questions. I can do 20.
-
A large number of applicants for admission to graduate study in business are given an aptitude test. Scores are normally distributed with a mean of 460 and standard deviation of 80. The top 2.5 percent of the applicants would have a score of at least (choose the nearest integer) Answer...
-
When must researchers use different hypothesis tests for independent and related samples?
-
conduct a simple survey project on the 20 sample on any incident.write a report and prepare power point to present it.
Ask a new Statistics and Probability Question
Tips for asking Questions
- Provide any and all relevant background materials. Attach files if necessary to ensure your tutor has all necessary information to answer your question as completely as possible
- Set a compelling price: While our Tutors are eager to answer your questions, giving them a compelling price incentive speeds up the process by avoiding any unnecessary price negotiations
Sample Questions
- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
- 2. What are the steps espoused by Applied Statistics in Business and Economics for formal hypothesis testing? Why is the sequence important?
Create a free account to get your question answered.
Sign up with your Email Address. (Already have an account? Login)
By creating an account you agree to our privacy policy, terms of use, and honor code
Sign up with Facebook Account
We do not post anything without your permission
