A statistical research yields to the sample proportion of a certain feature in a certain community be 0.43. Find the required sample size for a maximum margin of error of 0.06 for a 90% confidence interval.

Q: An epidemiologist with the Florida Department of Health needs to estimate the proportion of…

A:

Q: A sample of size 16 was taken from a very large population. Sample statistics, x¯ and s, were used…

A: Formulae to find x¯ and s from confidence interval is as follows ,    x¯ = Lower limit +Upper limit…

Q: Find the critical values, χ L 2 and  χ R 2, used for a 95% confidence interval for the standard…

A: Given: Degree of freedom = 25 α = 1 - 0.95 = 0.05

Q: A sample of size 10 has a sample mean of 1000 and a sample variance of 100. Then a 90% Confidence…

A: We have given that,  Sample mean (x̄) = 1000 and sample variance (s^2) = 100 and sample size (n) =…

Q: Calculate the minimum sample size required in order to make a 95% confidence interval for a…

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Q: A sample of size 85 from a population having standard deviation o = 45 produced a mean of 254.00.…

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Q: (b) Estimate the sample size needed if no estimate of p is available. A sample of elementary school…

A: From the provided information, Confidence level = 95% Margin of error = 0.06

Q: A random sample of size 20 yields has a sample mean of 3.13 and a sample variance of 1.45. Calculate…

A: Given data, n=20 x=3.13 s2=1.45 s=1.20 α=0.01df=n-1=19tc at α=0.01 and df=19 is tc=2.861

Q: Suppose that the sample size had been​ 240, with x bar=4.1 and s=3.1. Use technology to find a​ 95%…

A: Sample mean = x̅ = 4.1 Sample size = n = 240 Sample S.D = s = 3.1 Standard Error = s/√n  =…

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

A: Givensample proportion(p^)=0.80Margin of error(E)=0.09Confidence level(α)=90%

Q: When using a one-sample z-procedure to construct a confidence interval for the proportion of a…

A: When using a one sample z procedure to construct a confidence interval for the proportion of a…

Q: A sample of 51 recent graduates from a specific program yielded an average starting salary of…

A: From the provided information, Sample size (n) = 51 Sample mean (x̅) = $38500 Sample standard…

Q: An advertising company wishes to estimate the mean household income for all single working…

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Q: Given that you have a sample size of 10 different soda pops, with a sample mean of 2.228 and a…

A: From the provided information, Sample size (n) = 10 Sample mean (x̅) = 2.228 Sample standard…

Q: A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75…

A: E. Given information: sample mean=75 sample variance=25 Sample standard deviation=5 sample size=15…

Q: For a fixed sample size, what happens to a confidence interval for u when we increase the level of…

A: Given that for a fixed sample size.  We have to find what happens to a confidence interval for mu…

Q: Find the minimum sample size you should use to assure that your estimate of p will be within a…

A: We have to find sample size required.

Q: A 30 month study is conducted to determine the difference in rates of accidents per month between…

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Q: It is desired to obtain a confidence interval for a proportion p of businesses that plan to hire new…

A: Solution: Given information: p = 0.5 Population proportion E= 0.03 Margin of error α=0.10 Level of…

Q: a confidence interval inappropiately using a z statistics instead of a t statistic will give a…

A: When we use z instead of t in, it will result in a smaller margin of error and consequently narrower…

Q: 2. The population of SULU Hornbill ( one of the endangered bird species in the Philippines) has a…

A: In testing of a hypothesis, Confidence interval is an interval such that the probability of the…

Q: Find the sample size necessary for an 80% confidence level with a maximal margin of error E= 0.07…

A: Given that s.d =0.34,alpha =0.2,E =0.07 ( e) n= ?

Q: A sample of size n = 25 with the population standard deviation o = 3, compute the margin of error of…

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Q: In a study, Group 1 was found to have an average of 53 and a population standard deviation of 13 out…

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Q: For a two-sided confidence interval with 15 observations, Ox known, and a = 0.05 the (critical)…

A: Since the population SD is known the we will use the critical value of Z.

Q: Find a 90% confidence interval for the difference between the population means for the two…

A: Given : For Sample 1 x̄1 = 3.11 n1 = 12

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

A:

Q: Of 1000 randomly selected cases of lung cancer, 823 resulted in death.  H0: p=0.85 Ha: p does not…

A: Confidence interval: The (1-α) % confidence interval for proportion p is given by,

Q: A sample of 30 beams has an average strength of 1908.8 lbs. and s = 327.1. what is the 95%…

A:

Q: sample of size 12 drawn from a normally distributed population has a sample mean 38.7 and a sample…

A: We have given that  Sample size n =12 Sample mean = 38.7 sample standard deviation =14.9. 99.9%…

Q: An epidemiologist needs to estimate the proportion of residents of St. Lucie county that have been…

A:

Q: laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 206…

A:

Q: A sample of size 25 was taken from a very large population. Sample statistics, a and s, were used to…

A: For the given data Find mean =? s.d = ?

Q: Find the desired sample size for a 90% confidence interval with a margin of error equal to 0.03

A: Given information: Denote the population proportion as p. Since, the preliminary estimate of the…

Q: An epidemiologist with the Florida Department of Health needs to estimate the proportion of…

A: Given,sample proportion(p^)=0.951-p^=1-0.95=0.05margin of…

Q: 2. The population of SULU Hornbill ( one of the endangered bird species in the Philippines ) has a…

A: Given that  sample size=n=150 sample mean=X¯=65 population standard deviation=σ= 40 confidence…

Q: A sample from a normal population is given with mean 54 and the standard deviation 12. Find the…

A: Given : n = 25 x¯=54 S = 12

Q: A sample of size 25 was taken from a very large population. Sample statistics, x¯ and s, were used…

A:

Q: A random sample of size 30 from a normal population yields x̅ = 69  and s = 4.  The lower bound of a…

A:

Q: A sample of size n=56 is drawn from a population whose standard deviation is 4.5 Find the margin of…

A:

Q: A large trucking company wants to estimate the proportion of its trailer truck population with…

A: The random variable X follows binomial distribution. The sample size is 200. The proportion is 0.30.…

Q: A large trucking company wants to estimate the proportion of its tracker truck population with…

A: given that,size(n)=200success rate ( p )= x/n = 0.3

Q: An experiment with 25 randomly selected samples found out that the sample mean temperature for a…

A: Testing of Hypothesis: Testing of hypothesis is a rule which, when the sample values have been…

Q: The heights of the 1320 lower school students at Poole High School are normally distributed with…

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

Q: for a sample size of 12 and a 90% confidence interval, the t statistic used to estimate U would be.

A: Given: Sample size = 12 Confidence interval= 90%

Q: A random sample of size 30 from a normal population yields  = 39  and s = 4.9.  The lower bound of a…

A: Note:Hey there! Thank you for the question. In the first line, it is written “A random sample of…

Q: a) Find a 90% confidence interval estimate for the mean college football score if a sample of 100…

A: a) Given data, σ=6n=100x=46z-value at 90% confidence is Zc=1.645

Q: With a given sample of n=15, x=8900, and s=500, construct 99 percent confidence intervals for…

A: We have given that  n=15, xbar=8900, and s=500 Find the 99% confidence interval

Q: Suppose that for a random sample of 200 firms that revalued their fixed assets, the mean ratio of…

A: Given, n1=200 x-1=0.5170 S1=0.148 n2=400 x-2=0.489 S2=0.158 c=99%=0.99

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.