A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who support labeling legislation for genetically modified organisms​ (GMOs). Her estimate must be accurate within 4​% of the true proportion.   ​(a) No preliminary estimate is available. Find the minimum sample size needed.

Q: A researcher wishes to​ estimate, with 99​% confidence, the population proportion of adults who…

A: a) p= 0.50

Q: In order to estimate the population proportion with a high school education,  you need a minimum…

A: It is given that margin of error (E) is 0.07 and the confidence level is 0.95.Here,

Q: You wish to estimate, with a 99% confidence, the population proportion (p) of U.S adults who made…

A: Given information- Margin of error, E = 4.2% = 0.042 Confidence level, c = 99% a) Since no…

Q: a sampling distribution can be regarded as approximately normal when which conditions are met? In…

A: A sampling distribution is a probability distribution of a statistic obtained from a larger number…

Q: A survey of 2390 musicians showed that 398 of them are left-handed. Find a point estimate for p, the…

A: We have find population left handed..

Q: If you want to be99​% confident of estimating the population proportion to within a sampling error…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of the…

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of motor vehicle…

A: Here we need to find the sample size required in both the cases and compare the two results.

Q: A study shows that 93% of people prefer milk chocolate over dark chocolate. How large of a random…

A:

Q: You wish to estimate, with a 99% confidence, the population proportion (p) of U.S adults who made…

A: Given: Margin of error (E)=0.042Confidence level (c)=0.99α=1-c   =1-0.99    =0.01Area=1-α2…

Q: Suppose a certain Statistics instructor wants to estimate the proportion of students who enjoy…

A: Given datamargin of error=0.03

Q: A random sample of medical files is used to estimate the proportion p of all people who have blood…

A: Margin of error(E), E=z×p×qn From the above E, find n, n=zE2×p×q Here, E=0.04 There is no…

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of motor vehicle…

A:

Q: We are interested in conducting a study in order to determine what percentage of voters would vote…

A: Given that, If the prior information is unknown assume that the sample proportion  is 0.50 Critical…

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who…

A:

Q: A researcher wants to calculate the prevalence of Alzheimer’s among members of a specific community…

A: Option 1 A) n=3794 Explanation:

Q: Consider taking a point estimate from a randomly selected population of 120 students with a number…

A: The population is defined as a whole set of observations. It is difficult to deal with,…

Q: A pollster wishes to estimate, with 99% confidence, the proportion of people who believe that recent…

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

Q: Give an example of computing an appropriate sample size using the length of the interval.

A: Solution : Formula for computing sample size using the length of interval is, n = Zα2σd2 where , σ =…

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A: z-critical value at alpha(0.95) = 1.96 margin of error =0.08   p = 0.5

Q: Determine the point estimate of the population proportion for the sample provided. Lower bound:…

A: sample proportion = (Upper limit+lower limit)/2 = (0.212+0.152)/2 = 0.182

Q: 3. Use Slovin's Formula to compute for the value of n (number of samples) needed if the percentage…

A: Here use slovin's formula and stratified sampling method

Q: 4. A provincial Hospital wants to estimate the proportion of the patients with high Unk Acid who…

A: Let p^ be the sample proportion and q^=1-p^ E is the error of margin. E=Zα2p^q^n Hence, the required…

Q: A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of motor vehicle…

A: The independent variable is motor vehicle fatalities that were caused by​alcohol-impaired driving.…

Q: A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle…

A: Area on each tail for two-tail tests. Refer Standard normal table/Z-table OR use excel function…

Q: The IRS is interested in estimating the total number of tax accounts who has their own tax returns…

A: A random sample of 100 returns showed that 15 were audited; n=100 x=15 α=0.95

Q: Find the minimum sample size required to estimate the proportion of the population that supports a…

A: From the given information,   Margin error = 0.042 Assume sample proportion = 0.5   The objective is…

Q: The highway department wants to estimate the proportion of vehicles on Interstate 25 between the…

A:

Q: tion, the standard distance between a sample mean and the population mean is 5 points for samples of…

A: The formula of standard error: SE=sn Now,  the standard distance between a sample mean and the…

Q: researcher wishes to estimate, with 99% confidence, the population proportion of adults who support…

A: It is given that Population proportion p = 0.72 Margin of error E = 0.02 Level of confidence = 99%…

Q: A researcher wishes to estimate, with 99% confidence, the population proportion of motor vehicle…

A: Given that Margin of error, E = 3% = 0.03 Level of confidence = 99%. The critical value of Z at 99%…

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of motor vehicle…

A: Given data,E=3%=0.03z-value at 95% confidence is Zc=1.96

Q: Aresearcher wishes to estimate, with 95% confidence, the population proportion of adults who think…

A: The random variable who thought Congress is doing a good or excellent job follows binomial…

Q: A pollster wishes to estimate, with 95% confidence, the proportion of people who believe that recent…

A: a) Assume p-hat as 0.5, since no preliminary estimate is available.

Q: If you want to be 95% confident of estimating the population proportion to within a sampling error…

A: Obtain the sample size of a preliminary estimate for p with 0.40. The formula of sample size is,…

Q: A researcher wishes to estimate the proportion of college student who own a car. He wants to be 95%…

A: Given Confidence is 95% Error is 0.1

Q: A researcher wishes to​ estimate, with 99​% confidence, the population proportion of motor vehicle…

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

Q: A researcher wishes to​ estimate, with 90​% confidence, the population proportion of adults who…

A: From the provided information, Margin of error (E) = 4% or 0.04 Confidence level = 90%

Q: A researcher wishes to​ estimate, with 90% ​confidence, the population proportion of adults who…

A: GivenMargin of Error(E)=0.02sample proportion(p^)=0.5α=1-0.90=0.10α2=0.05zα2=1.645

Q: A researcher wants to estimate the impact prenatal care during pregnancy can have on anemia rates in…

A:

Q: A researcher wishes to​ estimate, with 90​% confidence, the population proportion of adults who…

A: Margin of Error = E = 0.05 Confidence Level = 90 Significance Level = α = (100-90)% = 0.1 α/2…

Q: A researcher wishes to estimate, with 90% confidence, the population proportion of adults who…

A: (a) The confidence level is 90%, margin of error is 0.07, and there is no prior information is…

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who…

A: From the provided information, Margin of error (E) = 5% or 0.05 Confidence level = 95%

Q: A marine biologist wants to estimate the average weight of a population of dolphins living in a…

A: Note: the options for the answers are not given. So, the answer is written in assumption. In order…

Q: In interval estimation, as the sample size becomes larger, the interval estimate     becomes…

A: Introduction: The width of the confidence interval depends upon several factors.

Q: If you want to construct a 90% confident interval for a population mean such that it is within a…

A: The confidence interval for the mean is given by :    CI = x¯ ± zα2 ×σn x¯ : sample mean σ :…

Q: At a certain college, it is estimated that fewer than 25% of the students have cars on campus. Does…

A: Given that,  H0: p= 0.25  H1: p=! 0.25 Sample size is n= 90 And x= 28 Proportion, P= x/n  = 28/90…

Q: A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of adults who…

A:

Q: You wish to estimate, with 99% confidence, the population proportion of US adults who think they…

A:

Q: A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of motor vehicle…

A: Solution: a. From the given information, confidence level is 0.99 and E=0.05.

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.