poll was conducted asking 1200 randomly selected adults what they think the ideal number of children for a family is. Of this sample, 53% thought 2 children is the ideal number.  A.) Check the conditions needed to form a confidence interval. B.) Construct and interpret the 95% confidence interval for the proportion of all US adults that think 2 children is the ideal number.

Q: Construct the 99% confidence interval estimate of the population proportion p if the sample size is…

A: Obtain the 99% confidence interval estimate of the population proportion. The 99% confidence…

Q: and ˆpp^ (p-hat) =0.52, find the margin of error at a 99% confidence level Give your answer to…

A: The margin of error can be calculated as: MOE=z×p^(1-p^)n

Q: Use the confidence interval to find the margin of error and the sample mean. (1.52,2.06)

A: Given: Confidence interval is (1.52, 2.06) To determine: The margin error and The sample mean.…

Q: A past survey of 1,068,000 students taking a standardized test revealed that 7.8% of the students…

A:

Q: If n = 590 and ˆp=0.48, find the margin of error at a 99% confidence level E=

A: If n = 590 and ˆp=0.48, find the margin of error at a 99% confidence level

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: Out of 400 people sampled, 156 preferred Candidate A. Based on this, find a 99% confidence level for…

A: given information : n=400 A=156 p=An p=156400   p=0.39

Q: In order to construct the 95% confidence interval, you choose which formula? O x ±1.645 × OT ±1.96 x…

A:

Q: A magazine article conducted a survey of 1000 people in Washington State and found that 26% of the…

A:

Q: Political survey- A political analyst found that 43% of 300 randomly seleted republican voters feel…

A: It is given that p hat is 0.43 and sample size is 300. The confidence level is 0.95.

Q: As part of constructing the 95%-confidence interval, we would choose which value for ta2 O 2.345…

A: We have given the statement  n= 16 Mean= 67 Standard deviation = 7.509

Q: In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: According to the given information in this question We need to find the 90% confidence interval of…

Q: If n=11, ¯xx¯(x-bar)=32, and s=9, find the margin of error at a 98% confidence level

A:

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

A: (a). Find the best point estimate of the population proportion p: It is given that, in a poll of n =…

Q: a. Locate the​ 95% prediction interval for driving accuracy​ (y) on the​ printout, and give a…

A: a. The MINITAB output is given.

Q: Out of a sample of 1,450 people, 1,000 said they prefer to drive themselves to work rather than…

A: Given Data: x=1000 n=1450   p^=10001450=0.6897   z-value corresponding to 95% Confidence…

Q: A national polling organization wishes to generate a 98% confidence interval for the proportion of…

A: We need to find the sample size for the given interval.

Q: If n=23, ¯x (x-bar)=38, and s=5, find the margin of error at a 99% confidence level

A: The degrees of freedom is obtained as follows:

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

A: Given , n = 1008 x = 598

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: The figure to the right shows the results of a survey in which 1016 adults from Country A, 1014…

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

Q: According to a report published by the Pew Research Center in February 2010, 61% of Millennials…

A: Given : Proportion of Millennials (people born between 1981 and 1996) think that their generation…

Q: If n=12, ¯xx¯(x-bar)=44, and s=5, find the margin of error at a 99% confidence level

A: Given: margin of error for a 99% confidence interval. n=12 x¯(x-bar)=44 s=5

Q: Elly and Drew work together to collect data to estimate the percentage of their classmates who own a…

A: Given that Elly and Drew work together to collect the data to estimate the percentage of their…

Q: Two samples are taken with the following numbers of successes and sample sizes r1 = 40 r2 = 33 n1 =…

A:

Q: use the given sample data and confidence level. In each case, (a) find the best point estimate of…

A:

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

A:

Q: If n=24, ¯xx¯ (x-bar)=50, and s=9, find the margin of error at a 95% confidence level (use at least…

A: Given,n=24x¯=50s=9degrees of freedom(df)=n-1df=24-1=23α=1-0.95=0.05α2=0.025t0.025(23)=2.069…

Q: If n=11, ¯xx¯(x-bar)=35, and s=8, find the margin of error at a 90% confidence level. Answer to two…

A: Margin of error = t critical * Standard error where    t critical is the value of t for 90%, two…

Q: What is the lower bound of a 90% confidence interval for the percent of the population that would…

A: here given ,  In a sample of 235 people, 40% responded they would vote for candidate A.  p^ = 0.40…

Q: If n=32, ¯xx¯ (x-bar)=49, and s=4, find the margin of error at a 95% confidence level (use at least…

A:

Q: A. Find a 98% confidence interval for the proportion of heads in the experiment. B. Is there a…

A: here given ,  sample size  = n = 15000  x = no of heads  = 7515 here p^ =  751515000 = 0.501

Q: If n=12, ¯xx¯(x-bar)=48, and s=6, find the margin of error at a 98% confidence level

A: From the provided information, Sample size (n) = 12 Sample mean (x̄) = 48 Standard deviation (s) = 6…

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

A:

Q: b) The safety commissioner in a large city wants to estimate the proportion of buildings in the city…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 12. A health professional is concerned that people aren't brushing their teeth correctly in Knox…

A: Note: Hey there! Thank you for the question. As you have posted multiple sub-parts, we have helped…

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: (c) If the confidence levels were 98% rather than 80%, would the margin of error be larger or…

A: The confidence levels are 98% and 80%.

Q: a recent poll, 210 people were asked if they liked dogs, and 42% said they did. Find the margin of…

A:

Q: a). Find a 93% confidence interval for p, the true crash risk (probability) for novice drivers, also…

A: For novice drivers, sample size n = 371, Number of crashes, X = 24 For expert drivers, sample size n…

Q: After surveying 625 potential voters polled, you find out that 325 support candidate X and 300…

A: The sample proportion confidence interval is, p^±Zp^(1-p^)nwhere, p^ = the sample proportion…

Q: b. Construct a 90% confidence interval for the percentage of all judges who are in favor of the…

A: a. A random sample of 15 judges and asked them whether or not they favor the death penalty in which…

Q: if n = 42, p = 0.6 then construct the 98% confidence interval for the population proportion.

A:

Q: Political Survey- A political analyst found that 43% of 300 randomly selected republican voters feel…

A: It is given that p hat is 0.43 and sample size (n) is 300. The confidence level is 0.95.

Q: If n=12, x¯(x-bar)=47, and s=3, find the margin of error at a 80% confidence level

A: Margin of error (E): The margin of error for sample mean is given by,

Q: A voter polling research group determined with a 99% confidence level that 41% of the voters in a…

A:

Q: In a past presidential election, 36,523,493 people voted for Candidate A; 36,417,321 for Candidate…

A: The appropriate interpretation is to be made considering the proportion of votes for candidate A.

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

A: Given, The sample proportion is,

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.