To calculate a confidence interval, one should take a point estimate and add and subtract a...
To calculate a confidence interval, one should take a point estimate and add and subtract a _____________.
standard error sample standard deviation population standard deviation margin of error
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Margin of errorAdd Answer to:
To calculate a confidence interval, one should take a point
estimate and add and subtract a...
This problem demonstrates how to calculate the confidence interval for a population proportion. After, you will...
This problem demonstrates how to calculate the confidence interval for a population proportion. After, you will be asked to redo the calculations (with small variations). A survey was conducted to determine how many people were in favor of a proposed law to criminalize texting while driving. Response options included strongly disagree, disagree, neither agree or disagree, agree, and strongly agree. The survey asked a random sample of 800 18- to 25-year-olds, and 648 indicated agreeing or strongly agreeing with the...
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find...
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval. The sample standard deviation is given below. Margin of error equals$5, standard deviation equals$19 The required sample size is __.
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find...
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval. The sample standard deviation is given below. Margin of error =$5,standard deviation=$25 The required sample size is ????? (Round up to the nearest whole number as needed.)
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find...
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval. The sample standard deviation is given below. Margin of error equals=$66, standard deviation equals=$2222 The required sample size is _____. (Round up to the nearest whole number as needed.)
Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best point estimate for p , the margin of error, and the confidence interval. A...
Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best point estimate for p , the margin of error, and the confidence interval. Assume the results come from a random sample. A 95% confidence interval for the proportion of the population in Category A given that 18% of a sample of 450 are in Category A. Round your answer for the point estimate to two decimal places, and your...
Which statement about a confidence interval estimate of is true? A. Increasing the sample size decreases...
Which statement about a confidence interval estimate of is true? A. Increasing the sample size decreases the error margin. B. Increasing the level of confidence decreases the error margin. OC. Decreasing the error margin makes the confidence interval wider. OD. Increasing the population mean increases the error margin, QUESTION 10 The fishing industry is interested in the mean weight of salmon caught by a certain fishing company. From previous years' data, the standard deviation of the weights of salmon caught...
Determine the point estimate of the population mean and margin of error for the confidence interval....
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 18, upper bound is 24. The point estimate of the population mean is . The margin of error for the confidence interval is .
Determine the point estimate of the population mean and margin of error for the confidence interval....
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 17, upper bound is 25. The point estimate of the population mean is The margin of error for the confidence interval is
To calculate a confidence interval, the margin of error (E) must first be calculated. The Margin...
To calculate a confidence interval, the margin of error (E) must first be calculated. The Margin of Error, E, for means is: E = 1.96*s/sqrt(n), where s is the sample standard deviation, n is the sample size. The “sqrt” stands for square root. The Margin of Error, E, for proportions is: E = 1.96*sqrt[p*(1-p)/n], where s is the sample standard deviation, n is the sample size, and p is the proportion. Use the Confidence Interval formula above, and the correct...
Determine the sample size needed to construct a 95% confidence interval to estimate the average GPA...
Determine the sample size needed to construct a 95% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.2. Assume the standard deviation of the GPA for the student population is 25 The sample size needed is (Round up to the nearest integer.) Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion for the following sample proportions when the margin...
Which statement about a confidence interval estimate of is true? A. Increasing the sample size decreases the error margin. B. Increasing the level of confidence decreases the error margin. OC. Decreasing the error margin makes the confidence interval wider. OD. Increasing the population mean increases the error margin, QUESTION 10 The fishing industry is interested in the mean weight of salmon caught by a certain fishing company. From previous years' data, the standard deviation of the weights of salmon caught...
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 18, upper bound is 24. The point estimate of the population mean is . The margin of error for the confidence interval is .
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 17, upper bound is 25. The point estimate of the population mean is The margin of error for the confidence interval is
Determine the sample size needed to construct a 95% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.2. Assume the standard deviation of the GPA for the student population is 25 The sample size needed is (Round up to the nearest integer.) Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion for the following sample proportions when the margin...
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