Suppose you wish to determine the proportion of college students in NC who receive some form of financial aid. You want to be 95% confident of your results and have a maximum error of 4%. Calculate the minimum sample size needed to meet these requirements given that the financial aid office at a local institution estimates the percentage to be 78%.

Q: If you want a poll to have a margin of error of 2.84%, how large will your sample have to be?

A:

Q: A report statesb that 45% of home owners had a vegetable garden, how large a sample is needed to…

A: Answer: From the given data, population proportion (P) =45% = 0.45 Margin of error (ME) = 6% = 0.06…

Q: Your professor wishes to estimate the proportion of high school students enrolled in college-level…

A: Given: margin of error of 3.5 percent 99% confidenp p= 18.3%

Q: A research is conducted to analyse whether the World Cup event has disturbance on the sleep quality…

A: Let p denotes the population proportion of adults having symptoms of sleep deficiency who did not…

Q: State the hypotheses. H₂: All the means are equal. H₂: At least one mean is different from the…

A: The quality control department measures weekly values of different suppliers for the percentage…

Q: You work for NASA and are interested in determining the population proportion, with 99% confidence,…

A:

Q: The margin of error in a research study is indicative of the precision and accuracy of the research…

A: Margin of error is a measure of the extent to which the sample may vary from population.  It is a…

Q: estimate how many people you would need to survey in order to estimate the percentage in your…

A: here given , Suppose you want to estimate the percentage of employees who want to work from home.…

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: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

A: Formula for the sample size needed to estimate a population proportion is

Q: How large the sample size should be in order to be 98 percent confident, if the sample proportion is…

A: Given data, p=0.78 E=0.16 z-value at 98% confidence is Zc=2.326 n=?

Q: The personnel director of the Target Corporation wants to estimate the number of employees within…

A: Given that  Sample size n =80 Favorable cases x =4 Sample proportion p^=x/n  =4/80 =0.05

Q: Sleep apnea is a condition which the sufferers stop breathing momentarily while they are asleep.…

A:

Q: Why do you think any serious researcher would use the sample mean to estimate for the population…

A: Generally research is carried out to determine a particularoutcome in the targeted…

Q: The test statistic is 1.26. Which of the following is the best interpretation of this value?

A: Given that  Test statistic is given by Z = 1.26

Q: Levi-Strauss Co manufactures clothing. The quality control department measures weekly values of…

A: Given the data of weekly values of different suppliers for the percentage difference of waste…

Q: You are a bank manager and you want to secure a raise for your bank tellers. The board of trustees…

A: In order to determine whether the average number of customers served by the teller per day is…

Q: Hurricane Andrew swept through southern Florida causing billions of dollars of damage. Because of…

A: Step 1:Determine the given variablesn=26,σ=5500,Xˉ=27500,μ=5500,α=0.10Step 2:Hypotheses…

Q: You want to obtain a sample to estimate the percentage of college students in the U.S. that get a…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.95.

Q: Consider a simple poll that is measuring the proportion of citizens that hold a particular political…

A:

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: given data   CI = 0.90, P ( - Z< P < Z ) = 0.90 therefore z = 1.645 ( =z table ) E = 6% =…

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: The local school is conducting another survey to determine the proportion of students at the school…

A: Confidence interval is defined as the range that contains the value of the true population…

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: From the provided information, Confidence level = 98% Sample proportion (p̂) = 0.20 Margin of error…

Q: If the sample size is n=16 what is likely true about the shape of the population?

A: Solution:  Central limit theorem: The central limit theorem state that as the sample size increases…

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: According to a census company, 7.1% of all babies born are of low birth weight. An obstetrician…

A: Here we conduct Z test for proprtion.

Q: Clarissa's grade point average is (Round to two decimal places as needed.)

A:

Q: should their sample size be?

A: here use solvin's formula

Q: elevision sports commentator wants to estimate the proportion of Americans who follow professional…

A:

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: According to the Law of Large Numbers what effect will increasing the sample size have on the sample…

A: It is given that the sample size increases.

Q: Hurricane Andrew swept through southern Florida causing billions of dollars of damage. Because of…

A: In hypothesis testing, we start by stating the null hypothesis (H0) and the alternative hypothesis…

Q: What value should we expect for our sample proportion?

A: We have to answer question based on proportion.

Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…

A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: A health organization wants to estimate the population proportion of Ohioans who have received the…

A: From the provided information, Margin of error (E) = 0.04 Confidence level = 99%

Q: If we construct a 95% confidence interval estimate for the true proportion of all Minnesota school…

A: here given, n = 200 sample proportion  =20200 = 0.1 here for z-critical use excel command…