In a biological study, the sampling mean proportion is .56 and the sample size is 120.  1. what is the margin of error with a confidence level of 99%? 2. what are the plausible values for the true proportion?

Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

A:

Q: Suppose that you plan to apply the one-mean z-interval procedure to obtain a 90% confidence interval…

A: a. Margin of error: Margin of error is a range of values that lie above and below the sample…

Q: In a survey of 600 personnel directors, 40% thought that they would be hiring new personnel over the…

A:

Q: If instead of 25, 80 male runners are selected for the study, what is the sampling error at 95%…

A: It is given that Sample size n = 80 Sample mean M = 53 Population SD = 5.5 Margin of error E = 0.8…

Q: If you need to make a 98% confidence interval for a proportion, and the margin of error is to be no…

A: Given information:  Confidence level = 98% Margin of error (e) = 0.025 Let proportion (p) = 0.5 The…

Q: What are the upper and lower limits and the width of CI if you change the confidence level to 99% M…

A: Formula : CI=point estimate ± ME

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A:

Q: Kim wants to determine a 80 percent confidence interval for the true proportion of high school…

A: Given: Margin of error, E=0.04 Confidence level=80%

Q: A research group wants to estimate the proportion of consumers who plan to buy a scanner for their…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.90.

Q: If the margin of error in an estimate for the mean weight of a shipment is + or -2 pounds at a…

A: From the provided information, The margin of error at a confidence level of 95 percent = ±2 The…

Q: What value should be reported as the mean?

A: Given, Values 4.63 4.58 4.82 4.31 4.67 4.6

Q: Suppose you plan to take a survey of Math&146 students asked how many miles they commute from their…

A: Given,Confidence Interval = 95%ME= Margin of Error =1.5σ=Population Standard Deviation=5.3

Q: For a research, let's consider the 10-unit sample with s = 32,866 as a preliminary example. For a…

A: Given data,s=32866E=10z-value at 95% confidence is Zc=1.96n=?

Q: If a confidence interval for the mean is (34≤μ≤86)(34≤μ≤86), a) What is the point estimate?    b)…

A: (a) The point estimate is 60, which is obtained below: Point estimate=Upper limit+lower…

Q: An internet service provider wishes to estimate, to within one percentage error, the current…

A: Given,margin of error(E)=0.01sample…

Q: A researcher would like to know the proportion of the households that has a cable subscription. She…

A:

Q: Suppose the 90% confidence interval for a population mean is (20, 55). What is the point estimate…

A:

Q: . If she wants to make a 95% confidence interval for the mean with the margin of error of 5 cm, at…

A: here from given information , σ = 17 cm MOE = 5cm here Z-critical for 95 % confidence level = 1.96…

Q: A researcher calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the…

A: Given :confidence level = 90% confidence interval = (0.24,0.4) p is unknown, so p=0.5 We want to…

Q: Suppose you survey a random sample from a large population to understand the population proportion.…

A: Given information- Margin of error, E = 6% = 0.06 Confidence level, c = 98% Since nothing is known…

Q: The ACME computer company wanted to estimate the proportion of defective computers that are produced…

A: a) The interval (.024, .066) is the confidence interval for proportion of defectives. Thus the…

Q: A vet wants to determine the proportion of household pets that have pet insurance. What size sample…

A: Given that  Margin of error=E=0.06 ,  90% confidence

Q: What are the upper and lower limits and the width of the CI if you change the confidence level to…

A: Given that M = 130 SD = 15 N = 49 We have to find the upper and lower limits for the confidence…

Q: Suppose that you plan to apply the one-mean z-interval procedure to obtain a 90% confidence interval…

A: It is given that the population standard deviation is 12 and the sample size is 9.

Q: A confidence level of 95%, if 25 red skittles were drawn from a box of skittles containing 400.  1.…

A: Given  confidence level = 95% let X: Number of red skittles were drawn from a box of skittles  X =…

Q: If a confidence interval for the mean is (31≤μ≤87) a) What is the point estimate?    b) What is…

A:

Q: 4.An internet service provider wishes to estimate, to within one percentage error, the current…

A: Given : Margin of error (E) = 1% = 0.01 Confidence level = 85% So , significance level (α) = 15% =…

Q: In June 2020, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing…

A: Given X=600 n=1000

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

A: The value of confidence level (CL) is 0.95.

Q: The 2008 General Social Survey asked, “What do you think is the ideal number of children for a…

A:

Q: Assume that you took a sample and calculated the sample mean as 100.you then calculated the lower…

A:

Q: Given that the 84% confidence interval for the waiting time (in minutes) of emergency room patients…

A: We have given the following statement About the confidence interval.

Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

A: (a)compute sample size ( n ) = n=(Z/E)^2*p*(1-p) Z a/2 at 0.1 level of significance is = 1.645sample…

Q: 4. How large a sample must be taken to estimate the proportion of households in which a cell phone…

A: In probability theory, a normal distribution is a type of continuous probability distribution for a…

Q: ce interval for the mean is (44 ≤ μ ≤ 98), a) What is the point estimate?

A: a) The Point estimate can be calculated as: Point estimate=LowerLimit+UpperLimit2=44+982=71

Q: A quality control specialist wants to estimate the percentage of defective batteries within 5% from…

A: A quality control specialist wants to estimate the percentage of defective within 5% from the true,…

Q: If a confidence interval for the mean is (41≤μ≤84)(41≤μ≤84), a) What is the point estimate?    b)…

A: a) What is the point estimate?

Q: If a confidence interval for the mean is (38≤μ≤89)(38≤μ≤89), a) What is the point estimate?    b)…

A: Given,   Lower bound = 38​ Upper bound = 89

Q: For a population data set, o = 13.7. - What should the sample size be for a 98 % confidence interval…

A: Given,standard deviation (σ)=13.7

Q: The estimated prevalence is 25% and the desired confidence level is 95% with a margin of error of 4%…

A: The estimated prevalence =25% E= 4% CI =95% CI= 0.95 p= 0.25 E= 0.04

Q: Suppose 600 students were surveyed regarding their GPAs. The average GPA was found to be 2.75. Using…

A: In this question we have to find the Margin of error if the standard deviation is 0.45.

Q: Suppose you want to construct an 80% confidence interval for the proportion of businesses that…

A: Given:Margin of Error (E)=3.5%=0.035   For Confidence level 80%, the significance level (α) is…

Q: If a confidence interval for the mean is (43≤μ≤82)(43≤μ≤82), a) What is the point estimate?    b)…

A: Given the confidence interval for the population mean in tri-linear inequality form: Hence,

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A:

Q: If a sample is used to estimate a population proportion p. What is the the margin of error M.E. that…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…

Q: 2. You are going to construct a 90% confidence interval for the proportion of adults that have a…

A: From the given information, let X be the number of adults that have a post-secondary education. The…

Q: Hospital administrators wish to determine the average length of stay for all surgical patients. A…

A:

Q: Aston’s Career Service wants to find out what proportion of Aston’s students work in a part-time…

A: From the given information, Population proportion = p = 60% = 0.60 Margin of error = E = 4% = 0.04…

Q: A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What…

A:

Q: Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in…

A: Solution: Given data: simple random sample(n) = 332 x =  40 (have recently had the flu)  95% =…

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.