Confidence interval for a proportion with a margin
Determine the sample size needed to calculate a 95% confidence interval for a proportion with a margin or error of 10%.
Expected delivery within 24 Hours
A study of college students show that 8 out of 12 students prefer a PC while 4 prefer Mac. Randomly select 2 students with no replacement between selections. Draw a tree diagram and place probablities on each branch.
Four out of every 10 online homes in the U.S. have switched to broadband high-speed internet. Two homes are randomly selected with no replacement between draws. Draw a tree diagram of the two draws including the probabilities.
There are two major types of regression analysis-simple and multiple regression analysis. Both types consist of dependent and independent variables. Simple linear regression has two variables-dependent and independent. Multiple regression consists
Efficacy of a drug. Seventy-five (75) people with hypertension were given a new drug for the treatment of their condition. Blood pressure was lowered sufficiently to reduce the risk of serious outcomes in 20 of the 75 patients. In what proportion
Ten voters are randomly selected and asked if they will vote for the incumbent President. Five said yes and three said no. Two students are randomly selected with no replacement between the selections.
A student in the concrete lab, places 6 low strength concrete test cylinders (3500 psi) with a batch of 9 high strength conrete test cylinders (8000 psi): (show all calculations)
Identify the populations and parameters of interest. Then state hypotheses. State and verify conditions for carrying out a significance test. Calculate the test statistic and the P-value.
An opinion poll asks an SRS of 100 college seniors how they view their job prospects. In all, 53 say "Good." The plus four 98% confidence interval for estimating the proportion of all college seniors who think their job prospects are good is:
1937962
Questions Asked
3,689
Active Tutors
1439211
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Consider the audience for your Social Advocacy Proposal. Through which group or legislative process did the original policy receive approval?
Review the Learning Resources on social work practice with children, interventions, and countertransference.
Define probable cause and its relationship to determining the legality of a search. Explain the purpose and application of the exclusionary rule.
How often are bone marrow transplants needed? How likely is it that others in the community will need and request a bone marrow transplant?
1. Analyze policies and procedures to ensure organizational compliance with regulations and standards 2. Adhere to the legal and regulatory requirements relate
What are the second and third order effects of a budget cut and provide some commentary regarding what other issues might surface
Suppose you were to implement a program for juveniles. What would your program address and how would you go about starting this program?