Suppose we know that a confidence interval for a population proportion is (0.572, 0.662), with a sample proportion of 0.617. What is the margin of error?

Q: Suppose that your sample size is 3000 and that you wish to construct a 95% confidence interval. Your…

A: From the provided information,n = 3000Confidence level = 95%Sample standard deviation (s) = 42.3

Q: If n = 220,p = 0.4,then what will be the 87.4% confidence interval for the population proportion?

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Q: A 95% confidence interval for a population mean was reported to be 134 to 142.  If the population…

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Q: if a sample n = 16, mean = 10.3,standard deviation is 2.6. calculate a 95% confidence interval.

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

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Q: If [330, 610] is a confidence interval for the population mean. Find the margin of eror. Select one:…

A: The upper limit of the confidence interval is (U) = 610 The lower limit of the confidence interval…

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: A researcher wants to make a ninety-five percent confidence interval for the population mean. She…

A: From the given information,Margin of error , E = 0.56 Population variance, 7.6 Using formula ,

Q: survey asked 8 adults how many years of education they had. The sample mean was 12.90 with a sample…

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Q: A student researcher wants to determine whether the mean score in Mathematics of the 25 students in…

A: Confidence interval are used to measure the range where the true parameter lies. It measure the…

Q: If n = 440 and p 0.52, construct a 90% confidence interval. %3D Give your answers to three decimals…

A: Find z-critical value:…

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

A: Given,   Sample size = 73 Sample mean = 19 Population standard deviation = 2.9

Q: A study of 96 bolts of carpet showed that their average length was 77.5 yards. The standard…

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Q: find tc for a 95% confidence level when the sample size is 6.

A: level of significance, alpha = 0.05from standard normal table, two tailed t alpha/2 with n-1 = 6 d.f…

Q: Assume that the population has a normal distribution.  A laboratory tested twelve chicken eggs and…

A: It is given that sample mean is 185 and standard deviation is 17.6.

Q: The 95% confidence interval of the variance of a population is computed as (12.367,21.761).…

A: Given information: The 95% confidence interval for the variance of a population is (12.367, 21.761).…

Q: We measure the heights of 57 students and obtain a sample mean of 67 inches and a sample standard…

A: Given information- Sample size, n = 57 Sample mean, x-bar = 67 inches Sample standard deviation (s)…

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.