Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If we want to estimate this proportion to within 2% at the 95% confidence level, how many randomly selected teenagers must we survey?

Q: For a population data set, σ=13.3. How large a sample should be selected so that the margin of error…

A: Obtain the sample size. The sample size is obtained below as follows: The formula of sample size is,…

Q: If n = 340 and p^=0.92, find the margin of error at a 90% confidence level E= Give your answer to…

A: Given,n=340p^=0.921-p^=1-0.92=0.08α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: You read in a U.S. Census Bureau report that a 90% confidence interval for the median income in 2012…

A: It is given that 90% confidence interval for the median income in 2012 of American households was…

Q: If we want a 95% confidence interval for proportion within 3% how large a sample do we need?

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.95.

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 4% = 0.04 Confidence level = 0.95

Q: Strictly speaking, what is the best interpretation of a 95% confidence interval for the mean? If…

A: In general, the 95% confidence interval interprets that there is 95% confidence that the population…

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: If X = 114, α= 20, and n = 33, construct a 99% confidence interval estimate for the population mean,…

A: Given data:  Sample Mean = 114 Population standard deviation = 20 Sample size = 33 Confidence level…

Q: In the construction of confidence intervals, if all other quantities are unchanged, a increase in…

A: Solution: The confidence interval is calculated by using the following formula

Q: In a survey, the planning value for the population proportion is p*=0.25 . How large a sample should…

A: Sample size: The sample size for a desired confidence level, α with a given margin of error, E is…

Q: (b) What sample size should be obtained if he wants to be within 4 percentage points with 95%…

A: B) It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A: Given information: x=586 n=1006

Q: If n = 330 and X = 264, construct a 95% confidence interval for the population proportion, p.

A:

Q: In a situation where the sample size was decreased from 39 to 29 in a normally distributed data set,…

A: Confidence interval formula is given by

Q: how many people should you sample? 4 80 125 382 383

A: Given : Margin of error: ME = 0.05

Q: a recent study of 100 people in Burlingame found that 19 were obese.  Find the 90% confidence…

A:

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A:

Q: If you knew that a study reported that 73% of pre-kindergarten children ages 3 to 5 whose mother had…

A:

Q: If n = 200 and p^ = 0.64, find the margin of error at a 95% confidence level.

A:

Q: In a survey, the planning value for the population proportion is . How large a sample should be…

A: Let, Proportion =p Margin of error=E CI is =Zc n=?

Q: If n=240 and ˆpp^ (p-hat) =0.91, find the margin of error at a 90% confidence level Give your…

A:

Q: Suppose you want to construct a 95% confidence interval for the proportion of people who will stop…

A: We have given that,  Margin of error (E) = ± 4% = ±0.04 and confidence interval = 95% Then,  We will…

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: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: According to the provided information, The z score at 95% confidence interval from the standard…

Q: 2. A researcher wants to estimate the daily expenses of college students. He wants a 95% confidence…

A: We have given that,  Population standard deviation (σ) = 99.50, margin of error (E) = 45 and…

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

A: Find z-critical value:…

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

A:

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

A:

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 3% = 0.03 Confidence level = 0.95

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 29, x¯ = 46, and s =…

A: From the provided information, Sample size (n) = 29 Sample mean (x̅) = 46 Sample standard deviation…

Q: If n=150 and ˆpp^ (p-hat) =0.25, find the margin of error at a 90% confidence level

A: n = 150p^ = 0.2590% confidence level

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

A:

Q: For a population data set, σ=12.6. How large a sample should be selected so that the margin of error…

A:

Q: For a population data set, σ = 13.0 . How large a sample should be selected so that the margin of…

A: Given, As per z-distribution table, the zcrit value for 96% confidence level is obtained as 2.05.

Q: The figure to the right shows the results of a survey in which 996 adults from Country A, 1006…

A:

Q: 3. Aresearcher wants to estimate the daily expenses of college students. He wants a 99% confidence…

A:

Q: The 2010 General Social Survey reported a sample where about 48% of US residents thought marijuana…

A:

Q: The figure to the right shows the results of a survey in which 999 adults from Country A, 1002…

A:

Q: 19) A political survey had a margin of error of 4.25%. If the surveyor used a 90% confidence level…

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

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A: Given data n=1026 x=520 confidence interval=95%

Q: If n=570 and ˆpp^ (p-hat) =0.89, find the margin of error at a 95% confidence levelGive your answer…

A: It is given that the value of n is 570, p hat is 0.89 and the confidence level is 0.95.Here,

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

A: Given : Population proportion (p*) = 0.25 Confidence level = 95% So ; significance level (α) =…

Q: If n=15, (x-bar)=46, and s=3, find the margin of error at a 90% confidence level Give your answer to…

A: According to the given information, we haveSample size, n = 15Sample mean = 46Sample standard…

Q: In a survey of 1037 US adults ages 65 and over, 643 were concerned about getting the flu. A 99%…

A:

Q: If you obtained one thousand 95% confidence intervals for a population mean, μ, roughly how many of…

A: A 95% confidence interval means that if we take 100 different samples and determine a 95% confidence…

Q: Jump to level 1 1. In a poll of 1000 randomly selected voters in a local election, 414 voters were…

A: We have given that,  Sample size (n) = 1000 and favorable cases (X)= 414 Then,  We will find the…

Q: For a sample with a mean of 10, a std of 5 and an n of 30, what is the lower bound of the 95%…

A: Given data, x=10σ=5n=30z-value at 95% confidence is Zc=1.96

Q: Suppose you needed to form a 92% confidence interval for a population mean. What z value would you…

A:

Q: In the construction of confidence intervals, if all other quantities are unchanged, a increase in…

A: Given : sample size in increased

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.