Suppose we know that a confidence interval for a population proportion is (0.105,0.355), with a sample proportion of p̂=0.23. What is the margin of error?

Q: Determine the point estimate of the population mean and margin of error for the confidence interval.…

A: Given, Lower bound = 18  upper bound = 26

Q: Suppose you take a sample of size 39 from a Normal distribution with unknown population mean and a…

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Q: Assume that the mean and standard deviation of a sample 10 units respectively. if the sample size is…

A: Sample size is n=25, sample standard deviation is 10 and mean is 10. The critical value is 2.0639…

Q: if E=0.07 and population standard deviation=0.8 then find the sample size for 99% confidence…

A: Margin of error(E)=0.07 population standard deviation(σ)=0.8 confidence level=99%

Q: ta 99% confidence interval for the mean number of hours a student studies per week. Assume that the…

A: We are going to find 99% confidence interval by finding the critical value

Q: Determine the margin of error for a confidence interval to estimate the population mean with n = 21…

A: n = 21  s​ = 12.6 confidence interval = 80%.

Q: The number of television sets coming off a production line each day is known to have a standard…

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Q: In a random sample of nine people, the mean driving distance to work was 25 miles the sample…

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Q: A professor wants to estimate how many hours per week her students study. A simple random sample of…

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Q: e confidence interval for a population mean is (240.53, 240.79). What are the sample mean and the…

A: The confidence interval for a population mean is (240.53, 240.79)WE HAVE TO FIND OUT THE MEAN AND…

Q: Suppose you want to construct a confidence interval with a margin of error of 0.03 (3%). Find the…

A: The formula for calculating sample size is, n = z2*p^(1-p^)MOE2 Where, z is the z score (default…

Q: Suppose you wanted to take another sample of dogs to find a 90% confidence interval of young dogs to…

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Q: What is the confidence interval estimate for the population mean? If the sample mean is 13 and error…

A: Given information: The sample mean is, M = 13 The error bound for the mean is, E = 3.2 It is…

Q: You want to estimate the difference between two population means using a 95% confidence interval.…

A: Given  Margin of Error (ME) = 0.6 The sample size of first population will be 100.

Q: using the confidence interval method, to test that population mean equals 14, a researcher obtains…

A: Solution: State the hypotheses. Null hypothesis: H0: µ=14. That is, the population mean is equal to…

Q: . If she wants to make a 95% confidence interval for the mean with the margin of error of 5 cm, at…

A: here from given information , σ = 17 cm MOE = 5cm here Z-critical for 95 % confidence level = 1.96…

Q: For an SRS of 66 students, the average exam score was a 73. Assume you know the population standard…

A: Given,Standard deviation(σ)=10margin of error(E)=1.0α=1-0.99=0.01α2=0.005Z0.005=2.58     (from…

Q: Among those taking the Graduate Record Exam, 18 people are randomly selected. This group had a mean…

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Q: You measure 20 dogs' weights, and find they have a mean weight of 44 ounces. Assume the population…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: If n = 180 and X = 144, construct a 99% confidence interval for the population proportion, p. Give…

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Q: In the estimation of the population mean, what if given that last year mean is 7.05 and SD is…

A: Confidence Interval provides a range of values for the estimated parameter.

Q: You have 16 vampire bats. These bats have a population variance of 3.4 ounces. You wish to make a…

A: Given: Sample size (n) = 16 Population variance σ2=3.4 Sample mean x¯=15.20 Confidence level = 0.950

Q: The amount of trash generated by US households (in lbs per day) is Normally distributed. You take a…

A: Given,   Sample size = 10 Sample mean = 10.91 Sample standard deviation = 4.736   The objective is…

Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

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Q: The amount of trash generated by US households (in lbs per day) is Normally distributed. You take a…

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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.