Describe about confidence intervals.

Q: In a survey of 2865 ​adults, 1413 say they have started paying bills online in the last year.…

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Q: Imagine that you conducted a study in order to calculate mean resting heart rate among patients at a…

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Q: In a survey of 2274 adults, 749 say they believe in UFOs. Construct a 99% confidence interval for…

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Q: Give a real life example of how confidence intervals are used.

A: Solution-: We want to get a real life example of how confidence intervals are used.

Q: Define the confidence level?

A: It is the likelihood of containing the true population parameter under the confidence interval when…

Q: Find a credible journal article or website where confidence intervals were used to make informed…

A: From the given information we find the solution.

Q: A sample of 500 nursing applicants included 80 men.  Determine the 95% confidence interval for the…

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Q: A survey found that out of 900 workers, 150 said they were interrupted by frank phone calls. Find…

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Q: In a sample of 110 adults, 76 had children. Construct a 95% confidence interval for the true…

A: It is given that, in a sample of 110 adults, 76 had children. It is needed to find a 95% confidence…

Q: Determine from a confidence interval whether a test is significant?

A: Null hypothesis states that there is no difference between populations or a set of given…

Q: ed 1294 people whether they performed any volunteer work during the past year. A total of 517 people…

A: The sample proportion is computed as follows,

Q: 8% of a sample of 400 foster children say they have suffered some type of abuse from their foster…

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Q: To assess the proportion of the readers of a magazine being professional, a random sample of 1000…

A: Given that the random sample of 1000 readers is selected and 660 are found to be professionals. That…

Q: A firm randomly samples 100 workers at its New York plant and finds that 32% of the workers say that…

A: The proportion of workers who say that they buy the firm’s product is 0.32.

Q: What does the 95% represent in a 95% confidence interval

A: Solution CI=95%

Q: Create a 95% confidence interval for the percent of people who shop on Amazon, using the Plus 4…

A: Given: ∝ = 0.05 n = 50 x = 47 Thus, p^= x/n = 47/50 = 0.94

Q: I need help with creating a confidence interval using gender as a healthcare variable

A: Here, we can can use the sample proportions relating to a particular gender type to find the effect…

Q: Out of 100 people sampled 48 had kids. Based on this construct a 90% confidence interval for the…

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Q: 980 adults to learn about their gym membership. The results showed that 574 of the respondents lack…

A: The random variable X follows normal distribution. We have to construct 95% confidence interval for…

Q: A survey showed 980 of 1500 adult respondents believe in global warming. Construct a 95% confidence…

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Q: any fans of ‘80’s music believe that the song “Open Arms” by the band Journey is an iconic song in…

A: Solution: Given information: Margin of error = E = 0.05 Confidence level = 0.90= 0.90 Assumed…

Q: Normality is relevant to confidence intervals around a parameter. Explain why.

A: Normality is relevant to confidence intervals around a parameter We have to find why normality is…

Q: In a survey of 2291 ​adults, 708 say they believe in UFOs.   Construct a 90% confidence interval for…

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Q: Michelle, a student studying music, randomly sampled fellow music majors and asked whether they…

A: Given information- Confidence interval = (0.09, 0.26) We have to find margin of error. We know that-…

Q: Do Construct a confidence interval on a slope?

A: The value of s2 is often obtained from regression tables as MSE.

Q: If the confidence level is increased, the margin of error decreases. True or False

A: In order to construct a confidence interval, the three basic information we needed are as follows,…

Q: The question was asking for 99% confidence interval for pop

A: The sample size is n = 11. The sample mean is, x̅ = 24.2 miles. The sample standard deviation is, s…

Q: What is the effect on the size of the confidence interval if a T score is used instead of a Z score?…

A: We have given that What is the effect on the size of the confidence interval if T score is used…

Q: What confidence coefficient was used to generate the confidence​ intervals?

A: The confidence intervals are given.

Q: Explain what happens when finding the margin of error if all stays the same except that the…

A: Conditions with respect to confidence interval and the margin of error:   As the confidence level…

Q: In a article you can read, among other things, that the relative risk of death was 0.70 (95%…

A: Relative risk is a ratio in epidemiology that measures risk of an event in one group to risk of the…

Q: In a sample of 190 adults, 133 had children. Construct a 90% confidence interval for the true…

A: Given:n = 190x = 133Confidence level = 90%

Q: If the confidence interval would only contain positive values, what would be your interpretation of…

A: The true value of the parameter range is calculated using the confidence interval. If the confidence…

Q: n a survey of 2111 adults in a recent​ year, 1244 say they have made a New​ Year's…

A: For 90 % CI , α =0.1 Zα2= 1.645 (+NORMSINV(0.05) --Excel function)) ___________________ For 95% CI ,…

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.