A researcher wishes to​ estimate, with 99​% confidence, the population proportion of motor vehicle fatalities that were caused by​ alcohol-impaired driving. His estimate must be accurate within 2​% of the population proportion. ​(a) No preliminary estimate is available. Find the minimum sample size needed. ​(b) Find the minimum sample size​ needed, using a prior study that found that 32​% of motor vehicle fatalities that were caused by​ alcohol-impaired driving. ​(c) Compare the results from parts ​(a) and ​(b).

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

A: a) p= 0.50

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

A: (a)   Obtain the minimum sample size with no prior information available.   The minimum sample size…

Q: A government agency wishes to estimate the proportion of drivers aged 16–24 who have been involved…

A: We have given that,  Sample proportion(p) = 0.12, margin of error   (E) = 1% = 0.01and confidence…

Q: An optometrist wishes to know the proportion of patients who undergo laser eye surgery who end up…

A:

Q: Twenty-five samples of 100 items each were inspected when a process was consideredto be operating…

A: a.

Q: If the auditor needed a point estimate for the population mean for all accounts at this bank, what…

A: here given ,  A federal auditor for nationally chartered banks, from a random sample of 100…

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

A: Given that Margin of error =E=0.05 Population proportion 84% = 0.84 90% confidence.

Q: A poll in one country indicated that 47​%favor imposing the death penalty​ (the country currently…

A:

Q: The homebuilder’s association reports that 75% of home buyers would like a fireplace in their new…

A: According to the homebuilder's report, the population proportion is 75%, but on the basis of the…

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

A: Solution: Given information: Margin of error = E= 0.01 Population proportion = p = 0.1073 Confidence…

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

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: n spite of the potential safety hazards, some people would like to have an Internet connectionin…

A: (a) Given that, Critical value: Using the z-table, the critical value at 95% confidence level is ,…

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

A: Given Data : Margin of error: ME = 0.03 confidence level: c= 0.95…

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

A: The formula for sample size is :n=Zc2p(1-p)E2 Given : E = 2%=0.02 Confidence level = 95% Zc=1.96

Q: For a test market find the sample size needed to estimate the true proportions if consumers…

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

Q: 6 randomly selected adult males vary from a low of 39 bpm to a high of 119 bpm. Find the minimum…

A: Using the range rule of thumb to estimate σ as: σ =  (Max-Min) /4 = (119-39)/4 =20

Q: To estimate a student’s average score, we need to collect a sample. Assume population standard…

A: Population standard deviation, sigma is 3. The z-critical value for 98% confidence interval is…

Q: 4. A researcher wants to calculate the prevalence of Alzheimer’s among members of a specific…

A: Sample Size: The formula for the sample size is as follows: Here, zα/2 is the critical value at 95%…

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 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: An auditor, examining a total of 820 accounts receivable of a corporation, took a random sample of…

A: According to the guidelines only three parts will be answered. Please upload others separately. (a)…

Q: Suppose the true proportion of voters in the county who support a specific candidate is 0.61.…

A: The mean of the sampling distribution of the proportion is given by; μp=p The standard error of the…

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

A: The random variable labeling legislation follows binomial distribution. The margin of error is 0.03.…

Q: You are working on a political campaign and you want to take a sample to determine your candidate’s…

A: From the given information , determine the sample size using margin of error with 95% of confidence…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: The provided information: Level of significance (L)=0.01 Sample size(n)=27 Intoxicated drive(X)=15…

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

A: Given,margin of error(E)=0.03α=1-0.95=0.05α2 =0.025z0.025 =1.96

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

A:

Q: A pollster wishes to estimate, with 99% confidence, the proportion of people who approve of how…

A: From the provided information, Confidence level = 99% Margin of error = 0.03

Q: 2. Riana wants to estimate the average blood pressure of adults in a certain city with a know n…

A: The concept of confidence interval comes under the concept of interval estimation, which is a type…

Q: ccording to an article the bottled water you are drinking may contain more bacteria and other…

A: Given : Population size, N =  more than 1100 bottles Nearly​ one-third exceeded government levels ,…

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: On my trip to Ireland, I became fascinated with the problem of counting "carrots"; I have never seen…

A:

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

A:

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 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 95​% ​confidence, the population proportion of motor vehicle…

A: Critical value: Using Excel formula “=NORM.S.INV(1-(0.05/2))”, the z-value is obtained as 1.96.

Q: .For a test market, find the sample size needed to estimate the true proportion of consumers…

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

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: The manager of a company wants to check the inventory records against the physical inventories by a…

A: It is given that Proportion p = 25% = 0.25 Margin of error E = 10% = 0.1 Level of confidence = 95%…

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

A:

Q: A 95% confidence interval for the mean was computed with a sample of size 90 to be (16,22). b. What…

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 95% confidence, the population proportion of motor vehicle…

A:

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

A: The formula for the confidence interval at 95% confidence level is given by : C.I = p±zα/2.pqn Where…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.