What sample size needs to be taken to provide a margin of error of 9 or...
What sample size needs to be taken to provide a margin of error of 9 or less with 99% confidence when you have a known population standard deviation of 17?
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What sample size needs to be taken to provide a margin of error
of 9 or...
• For Example 1, Calculate the Sample Size Reqiured for a margin of error of only...
• For Example 1, Calculate the Sample Size Reqiured for a margin of error of only m=0.5 Example 1 (Review): Finding the 99 % confidence interval of the population mean • Let's say Joe measures the average cross section area of pvc piping to be 20 millimeters squared for a sample of 64.. Joe knows the population sample standard deviation to be 10 millimeter squares. Construct a 99% Confidence interval of the situation. • Since both the population standard deviation...
A) Sample of size 15 is taken from among a population of egrets and used to...
A) Sample of size 15 is taken from among a population of egrets and used to calculate a 99% confidence interval for the true average wingspan in the population. Suppose the sample standard deviation is calculated to be s =6.2. What is the margin of error for the confidence interval? Round your answer to 3 decimal places. B) Suppose you are asked to construct a 99% confidence interval for an unknown population mean μ. The population standard deviation is unknown...
For confidence interval computations, if the sample size is increased, we expect the margin of error...
For confidence interval computations, if the sample size is increased, we expect the margin of error to: a. Increase b. Decrease c. stay the same The company you work for produces automotive parts for GM. A certain machine that makes a cutout in a piece of steel averages a cut size of 203.2085 mm with a standard deviation of 0.2083 mm. A random sample of 66 is taken from the population. What is the distribution of the sample mean? Approximately...
what is the margin of error and the confidence interval? Question Help In a random sample...
what is the margin of error and the confidence interval?
Question Help In a random sample of seven people, the mean driving distance to work was 24.7 miles and the standard deviation was 6.6 miles. Assuming the population is normally distributed and using the I-distribution, a 90% confidence interval for the population mean is (15.5, 33.9) (and the margin of error is 9.2). Through research, it has been found that the population standard deviation of driving distances to work is...
1. What sample size is needed to estimate the mean white blood cell count (in cells...
1. What sample size is needed to estimate the mean white blood cell count (in cells per (1 poin microliter) for the population of adults in the United States? Assume that you want 99% confidence that the sample mean is within 0.2 of population mean. The population standard deviation is 2.5. O 601 1036 O 1037 O 33 2. The sample space of a population being researched contains 58 values and a mean of 318.6. (point The population has a...
sample should be taken to provide a 95% confidence interval with a margin of error of...
sample should be taken to provide a 95% confidence interval with a margin of error of .05? At 95% confidence, how large a sample should be taken to obtain a margin of error of .03 for the estimation of a population proportion? Assume that past data are not available for developing a planning value for p* 34.
It is desired to have a margin of error of 100 with 99% confidence. The population...
It is desired to have a margin of error of 100 with 99% confidence. The population standard deviation is 500. What is the necessary sample size? To reduce the margin of error to 50 what would be the necessary sample size?
O A. As the sample size decreases, the margin of error decreases ○ B. AS the...
O A. As the sample size decreases, the margin of error decreases ○ B. AS the sample size nonases, the margin of error stays the same. O C. As the sample size inoreases, the margin of error decreases ○ C. As te percent confdence deoreases, the size of the interval increases How does increasing the sample size affect the margin of error, E? O A. O B. As the sample size increases, the margin of error stays the same. As...
Here is an example with steps you can follow: sample size n=9, sample mean=80, sample standard...
Here is an example with steps you can follow: sample size n=9, sample mean=80, sample standard deviation s=25 (population standard deviation is not known) Estimate confidence interval for population mean with confidence level 90%. Confidence Interval = Sample Mean ± Margin of Error Margin of Error = (t-value)×s/√n t-value should be taken from Appendix Table IV. For n=9 df=n-1=9-1=8 For Confidence Level 90% a = 1 - 0.90 = 0.10, a/2 = 0.10/2 = 0.05 So, we are looking for...
Suppose a random sample of size 17 was taken from a normally distributed population, and the...
Suppose a random sample of size 17 was taken from a normally distributed population, and the sample standard deviation was calculated to be s = 5.0. a) Calculate the margin of error for a 95% confidence interval for the population mean. Round your response to at least 3 decimal places. b) Calculate the margin of error for a 90% confidence interval for the population mean. Round your response to at least 3 decimal places.
• For Example 1, Calculate the Sample Size Reqiured for a margin of error of only m=0.5 Example 1 (Review): Finding the 99 % confidence interval of the population mean • Let's say Joe measures the average cross section area of pvc piping to be 20 millimeters squared for a sample of 64.. Joe knows the population sample standard deviation to be 10 millimeter squares. Construct a 99% Confidence interval of the situation. • Since both the population standard deviation...
what is the margin of error and the confidence interval?
Question Help In a random sample of seven people, the mean driving distance to work was 24.7 miles and the standard deviation was 6.6 miles. Assuming the population is normally distributed and using the I-distribution, a 90% confidence interval for the population mean is (15.5, 33.9) (and the margin of error is 9.2). Through research, it has been found that the population standard deviation of driving distances to work is...
1. What sample size is needed to estimate the mean white blood cell count (in cells per (1 poin microliter) for the population of adults in the United States? Assume that you want 99% confidence that the sample mean is within 0.2 of population mean. The population standard deviation is 2.5. O 601 1036 O 1037 O 33 2. The sample space of a population being researched contains 58 values and a mean of 318.6. (point The population has a...
sample should be taken to provide a 95% confidence interval with a margin of error of .05? At 95% confidence, how large a sample should be taken to obtain a margin of error of .03 for the estimation of a population proportion? Assume that past data are not available for developing a planning value for p* 34.
O A. As the sample size decreases, the margin of error decreases ○ B. AS the sample size nonases, the margin of error stays the same. O C. As the sample size inoreases, the margin of error decreases ○ C. As te percent confdence deoreases, the size of the interval increases How does increasing the sample size affect the margin of error, E? O A. O B. As the sample size increases, the margin of error stays the same. As...
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