One important thing that the government looks at when allowing funds for financial aid is the proportion of students that would graduate with a bachelor's degree in 4 years or less, (15 units per semester) Find the sample size needed to estimate that proportion. For this problem use a confidence level of 90% and a margin of error of 2% i) find the sample sie when nothing is known about the percentage to be estimated. ii) Now find the sample size assuming studies have shown that 45% of all students earn their degrees in four years.

Q: 2) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

A:

Q: Suppose you wish to determine the proportion of college students in NC who receive some form of…

A: Givenconfidence level=95%Margin of error(E)=0.04sample proportion(p^)=0.78

Q: Suppose that the pulse rates of adult males vary from a low of 30 bpm to a high of 110 bpm.  Assume…

A: pulse rates of adult males vary from Low =30 bpm High=110 bpm confidence level=95% Margin of…

Q: Suppose that the pulse rates of adult males vary from a low of 35 bpm to a high of 115 bpm.  Assume…

A: Minimum value=M=35, Maximum value=Mo=115, Margin of error=E=3

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given Information: Confidence level = 80%  Error (e) = 0.05 Proportion (p) = 0.5 (assumed)  The z…

Q: A doctor wants to estimate the mean HDL cholesterol of all 20-29 year old females. How many subjects…

A: formula for the sample size needed to estimate a population mean is

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: The formula for the sample size is as follows:

Q: A study quoted in The Windsor Star suggested that mathematics should be taught in the afternoon…

A: We have given that,  Confidence interval = 95 % and margin of error (B) = 0.06 Then,  We will find…

Q: What size sample should be used to estimate a population proportion within 0.02 with 80% confidence…

A: population proportion = P = 0.02 Level of significance = α = 0.02 population proportion is between…

Q: you want to obtain a sample to estimate a population mean. based on previous evidence, you believe…

A:

Q: A researcher wishes speeders who exceed the posted speed limit on a particular stretch of road in…

A: Given that the confidence level is 98% Therefore, the significance level is 1-confidence…

Q: (a) If researchers decide on a 4.2% margin of error for a 95% confidence interval. What sample size…

A: a) Given:    Sample proportion(p)      = 50%           = 0.5                           and   q…

Q: Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 99%…

A:

Q: (T/F) To choose a sample size before estimating a proportion, we need to know the desired confidence…

A: The objective of the question is to determine whether the desired confidence level is necessary when…

Q: The pulse rates of 179 randomly selected adult males vary from a low of 43 bpm to a high of 103 bpm.…

A: Given : The pulse rates of 179 randomly selected adult males vary from a low of 43 bpm to a high of…

Q: We want to estimate the number of female chicks in a big aviculture via sampling. How many chicks…

A: To estimate the number of female chicks with a specified margin of error and confidence level, we…

Q: g that = 41.0 (in milligrams per 100 millileters-mg/100 ml). If the researcher wants to be 96%…

A: The population standard deviation  (σ)  = 41.0confidence level = 96%The margin of error (E) =4To…

Q: hy is an interval estimate for the population preferred to a point estimate?

A: We know that  Point estimate : It is a single value (Statistic) used to estimate the population…

Q: estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: If you want to be 99% sure confident of estimating the population mean to within a sampling error of…

A: The critical value from the standard normal table at 99% confidence level is,

Q: Calculate the minimum sample size that you must have to meet these requirements.

A: Let p be the pop. prop. of college students in the state who receive the form of financial aid.Given…

Q: The water works commission needs to know the mean household usage of water by the residents of a…

A: The margin of error is 0.13 and the variance is 2.56.

Q: What sample size is needed to give a margin of error within ±3% in estimating a population…

A:

Q: What is the minimum sample size required to estimate the population proportion with thag Margin of…

A: Given, Margin of error = 0.028 Confidence level = 0.99 p^ and q^ are unknown.

Q: An IQ test is designed so that the mean is 100 and the standard deviation 13 is for the population…

A: The sample mean is within 7 IQ points of the true mean and population standard deviation is 13.…

Q: A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many…

A: Given information Standard deviation s = 16.4 Confidence interval = 0.95 Significance level(α) = 1-…

Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

A:

Q: If you want to be 99% confident of estimating the population proportion to within a sampling error…

A: Answer:- Given, Confidence level, C = 99% = 0.99Error, E = 0.06Population proportion, p = 0.43 Using…

Q: What is the margin of error för a sample of 34 students whose average height. with 90% confidence,…

A: Given Information: Given is 90% confidence interval for average height calculated using sample size…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.