A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 3 percentage points with 99​% confidence if he uses a previous estimate of 25​%(?) and if he he does not use any prior​ estimates?

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Solution: From the given information, confidence level is 0.80, p=0.18 and E=0.03.

Q: How many students should be sampled in order to be 90% confident in estimating the proportion in…

A: Given that  Margin of error =E =0.10 90% confidence.

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

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

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: Margin of Error(E)=0.05For 99% confidence level Zα2=2.576 Formula; E=Zα2×(p×(1-p)n)

Q: A study found that 73% of elementary students buy lunch at school at least once a month. How large a…

A: Given,sample proportion(p^)=0.73margin of error(E)=0.03α=1-0.95=0.05α2=0.025Z0.025=1.96       (from…

Q: what size sample should be obtained if the estimate is to be within 0.01 with a 95% confidence if my…

A: Given,E=0.01p=0.32z-value at 95% confidence is Zc=1.96n=?

Q: A person wants to know if the proportion of the people in Dubai who commutes to work by public…

A: The random variable is proportion of the people in Dubai who commutes to work by public…

Q: It's believed that as many as 24% of adults over 50 never graduated from high school. We wish to see…

A: Givenpopulation proportion(p)=0.24Margin of error(E)=0.02confidence level=95%

Q: If we want to be within 0.02 of the true proportion of homes that have a direct television receiver…

A: The population proportion is 82%, the confidence level is 98% and estimate is within 0.02.…

Q: 7. Create a confidence interval for o using the following information: Ages of people driving in the…

A:

Q: As we may all know, adults use credit cards for all sorts of reasons. A survey found that 66% of…

A: Find z-critical value: For the two-tail test, Area on each tail. Area to the left of the normal…

Q: A survey of British 1,243 folks showed that 45% of respondents beloved the queen had done a good job…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: It is given that margin of error (E) is 0.04 and the confidence level is 99%.Here,

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A:

Q: The Slayer's Cake Bakery wishes to estimate the proportion of its customers who are repeat customers…

A:

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: p = 0.23E = 0.03Confidence level = 95%

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

A: Solution: a. From the given information, confidence level is 0.96, p=0.48 and E=0.03.

Q: 1a. If we have a sample size of 551, what will be our margin of error at 95% confidence? Please give…

A: Hello! Thanks for the question. You have posted two different questions. As per guidelines, we are…

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) Given,   Margin error = 0.02 Population proportion = 0.36   The objective is to find the sample…

Q: It's believed that as many as 22 % of adults over 50 never graduated from high school. We wish to…

A: In general terms, the larger the sample size n, the more precise of an estimate can be obtained of a…

Q: The Bata Shoe Museum states that 4343% of women wear shoes that are too small for their feet. A…

A: Given,sample proportion(p^)=0.43margin of error(E)=0.015α=1-0.98=0.02α2=0.01Z0.01=2.3263       (from…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: GivenMargin of error(E)=0.03confidence level(c)=99%α=1-0.99=0.01α2=0.05zα2=z0.05=1.6449   (from…

Q: (c) Suppose that the researchers wanted to estimate the proportion of patients under 50 years old…

A: Givenx=19n=356Margin of error(E)=0.03p^=xn=19356=0.0534Confidence interval = 95%

Q: 3. You plan to conduct a survey to find out what proportion of the workforce has two or more jobs.…

A:

Q: 10. You want to estimate the proportion of all college students who traveled during spring break.…

A: Let X be the number of students reported travelling during spring break and n be the sample size.…

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: It is given that margin of error (E) is 0.02 and the confidence level is 0.90.

Q: It's believed that as many as 21% of adults over 50 never graduated from high school. We wish to see…

A: given data p^ = 0.2190% ci for pE is given we have to find sample size required.

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: From the provided information,Confidence level = 90%

Q: Statistics Canada wants to know the unemployment rate in Vancouver during any part of last year. How…

A: confidence level=90% Margin of error(E)=0.012

Q: If you knew that I study reported that 67% of pre-kindergarten children ages 3 to 5 whose mother had…

A:

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: population proportion(p)=0.15confidence level=85%Margin of error(E)=0.03

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…

A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…

Q: In USE SALT students

A:

Q: An economist wants to know if the proportion of the U.S. population who commutes to work via…

A: The objective is to find the sample size required if an economist wants an estimate of the…

Q: It's believed that as many as 20% of adults over 50 never graduated from high school. We wish to see…

A: Sample size: Sample size is defined as the number of observations in the sample data. The formula…

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Given,   Margin error = 0.02 Population proportion = 0.16   The objective is to find the sample…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A:

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: population proportion (p) = 0.23 let, sample proportion = m and , number of samples to be collected…

Q: In a​ poll, 51​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Let p denote the proportion of people answered yes to the question. Let E denote the margin of…

Q: It is believed that 12% of Americans use a traditional antenna to watch network television. How…

A: Given that  Population proportion p=12%=0.12 Margin of error =E =2%=0.02

Q: Suppose the Statistics Department at TAMU wants to create a confidence interval for the proportion…

A:

Q: A politician wants to estimate the proportion of the voting population in the district who favor the…

A:

Q: Now, let's imagine the poll that found that 52% of U.S. adults believe that the federal government…

A: n = 1010 95% CI , margin of error = 2% point estimate for p = 52% CI = ?

Q: cher wishes to estimate the percentage of adults who support abolishing the penny. What size sample…

A: (a) At a 95% confidence level, the z value is 1.96 which can be obtained by using the standard…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) The confidence level is 99% Therefore, α = 0.01 and α/2=0.005. The margin of error is 0.05 Since…

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.