A university dean is interested in determining the proportion of students who recieve some sor of financial aid. Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. If the dean wanted to estimate the proportion of all students receiving financial aid to within 4% with 90% reliabilty, how many students would need to be sampled?

Q: what is sampling methods?   A large social media company wants to survey its users about their…

A: Sample is a small part (or) portion of the population. For example, to check the weights of male in…

Q: In preparing a report on the economy, we need to estimate the percentage of business that plan to…

A:

Q: In 1941, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: We have given that For the survey taken in 1941 n1 = 1100x1 = 374p̂ = x1/n1 = 151/429 = 0.3520 And…

Q: Mrs. Feleo samples her class by selecting every ninth person on her class list. Which type of…

A: Mrs. Feleo samples her class by selecting every ninth person on her class list

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: Bopulation proportion of 1943 adults who were total abstainers and p, represent the population…

A: Solution: Given N1=1100,  X1=429 N2=1100,  X2=374 (α)= 0.05

Q: A random sample of 1400 Internet users was selected from the records of a large Internet provider…

A: Given data A random sample of 1400 internet users was selected  and asked whether they would use…

Q: Among 1815 randomly selected high school students surveyed by the Centers for Diseases Control, 300…

A: Given X=300 n=1815

Q: In a survey, 1000 respondents were asked about product preference. Of the interviewed, 65% favored a…

A:

Q: (a) The auditor reviews all 15,000 student-aid packages. Choose the correct answer below. O…

A: a) All 15,000 student-aid packages are reviewed by the auditors.

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: The objective of this question is to estimate the proportion of tenth graders reading at or below…

Q: A researcher divided subjects into two groups according to gender and then selected 200 members from…

A: Since we know that In stratified sampling we divided homogeneous groups from the heterogeneous…

Q: I want to estimate the proportion of college professors who believe in aliens. How many college…

A: It is given that margin of error (E) is 0.05 and the confidence level is 0.95.

Q: Given 1,400 freshmen students with 600 male students and 800 female students, describe the way you…

A: The population is of freshmen students =1400The number of male students in  Strata-1 =600The…

Q: Suppose you wanted to know the proportion of students who wear glasses on campus and you went ahead…

A: you wanted to know the proportion of students who wear glasses on campus  you went ahead and survey…

Q: sample st. dev   Point estimate =                     Margin of the Error =   Show the Formula that…

A: The point estimate can be obtained using the excel formula “=AVERAGE(A1:A28)”. From the Excel…

Q: The city of Raleigh has 11,700 registered voters. There are two candidates for city council in an…

A: Consider x denotes voter supports Brown. Here, n = 350 and x = 178.

Q: In a survey of 671 subjects, each was asked how often he or she watched TV. The survey subjects were…

A: Voluntary response sampling: In voluntary response sampling, the respondents select themselves into…

Q: Jennifer is interested in conducting a study in the amount of money people spend at her local…

A: Jennifer is interested in conducting a study in the amount of money people spend at her local…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

Q: In 1942 ​, an organization surveyed 1100   adults and​ asked, "Are you a total abstainer​ from, or…

A: The proportion of considered subjects, on which we are interested from a sample can be termed as…

Q: Why does this a situation call for a matched-pairs analysis?

A: Test is that whether there is difference between the measurements.

Q: If N is the size of the population and n is the size of the sample, find the sampling fraction?

A: From the provided information, The population size is N and the sample size is n.

Q: A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Q: In a study comparing banks in Germany and Great Britain, a sample of 145 matched pairs of banks was…

A: Given ,  d = German – Great Britain Sample mean of the difference = d¯ = 0.0518 sample standard…

Q: Thirty-three percent of all Americans drink bottled water more than once a week (Natural resources…

A: Note: Hi there! Thank you for posting the question. Unfortunately in the sub-part(b), some required…

Q: Suppose 50% of all voters in a population support a politican, SHARE What is the zscore of sample…

A:

Q: In 1945, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Let, X1= number of abstainer in the previous test n1= total sample size of the past test p1^ =…

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Step…

A: Sample size n=549Favorable cases x=98

Q: Harley Davidson motorcycles make up 13% of all the motorcycles registered in the United States.You…

A: Approximate distribution is normal

Q: Hypertension is when an adult is classified as having high blood pressure (above 130 systolic blood…

A: Answer  X =1219 n =3532

Q: In 1944​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: We habe to find given proportion.

Q: In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests."…

A: Given information: Sample of 200 buses and find that 20 buses fail the safety inspection. Let us…

Q: A company is interested in seeing if the average call time to its call center is more than/greater…

A: A company is interested in seeing if the average call time to its call center is more than/greater…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Critical value: Here, α = 0.01. Using excel formula “=NORM.S.INV(1-(0.01/2))”, the critical value is…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.