A sample of size 60 gives 95% CI (-1.26, 3.82). Find the sample standard deviation. Show...
A sample of size 60 gives 95% CI (-1.26, 3.82). Find the sample standard deviation.
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A sample of size 60 gives 95% CI (-1.26, 3.82). Find the sample
standard deviation.
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A 95% CI is calculated from sample size of 83, and is (56.9, 73.2) for the...
A 95% CI is calculated from sample size of 83, and is (56.9, 73.2) for the mean speed in miles per hour. What is the point estimate at the center of the interval? What is the standard deviation of the sample from which is was drawn?
A sample of size n=95 is drawn from a population whose standard deviation iso = 38....
A sample of size n=95 is drawn from a population whose standard deviation iso = 38. Part 1 of 2 (a) Find the margin of error for a 90% confidence interval for u. Round the answer to at least three decimal places. The margin of error for a 90% confidence interval for p is Part 2 of 2 (b) If the sample size were n = 62, would the margin of error be larger or smaller? (Choose one) , because...
the population standard deviation is 6.84 days, assuming a 95% confidence, what sample size would be...
the population standard deviation is 6.84 days, assuming a 95% confidence, what sample size would be required to obtain a margin of error of 2 days? (Remember to round up to the nearest whole number for sample size.)
Score: 0 of 1 pt For the provided sample mean, sample size, and population standard deviation,...
Score: 0 of 1 pt For the provided sample mean, sample size, and population standard deviation, complete parts (a) through (c) below. x#21,n-100, σ 2 Find a 95% confidence interval for the population mean. The 95% confidence interval is from | | to (Round to two decimal places as needed.) Enter your answer in the edit fields and then click Check Answer. parts remaining
1. A population has a mean of 60 and a standard deviation of 30. Samples of...
1. A population has a mean of 60 and a standard deviation of 30. Samples of size 16 are randomly selected. Calculate the standard deviation of the sample distribution X. 2. Samples of size 16 are drawn from a population. the sampling distribution for X has a standard deviation of 0.25. Find the standard deviation of the population. 4. Tires are found to have a mean life of 40,000 miles. The standard deviation is 8000. A sample of 400 is...
A sample of size π=95 is drawn from a population whose standard deviation is σ=27.
A sample of size π=95 is drawn from a population whose standard deviation is σ=27. Part 1 of 2 (a) Find the margin of error for a 99% confidence interval for H. Round the answer to at least three decimal places. The margin of error for a 99% confidence interval for u is _______ . Part 2 of 2 (b) If the confidence level were 90%, would the margin of error be larger or smaller?
It is known that the population standard deviation for the IQ test is 14. What sample...
It is known that the population standard deviation for the IQ test is 14. What sample size would be needed to collect in order to calculate a 95% CI for the mean that is within 0.08 points? What sample size would be needed to collect in order to calculate a 98% CI for the mean that is within 1 point?
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information...
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) below. x overbarx equals=25, n equals=38, sigma σ equals=4 confidence level equals=95% Click here to view page 1 of the standard normal distribution table. LOADING... Click here to view page 2 of the standard normal distribution table. LOADING... . Use the one-mean z-interval procedure to find a confidence interval for the mean of the population from which the...
(b) Using the data provided, in Excel, find the sample average and the sample standard deviation....
(b) Using the data provided, in Excel, find the sample average and the sample standard deviation. Find the sample size, find the degrees of freedom, find the t-critical value. (c) Compute a 95% confidence interval for the population average. State your confidence interval in words, clearly stating the context, and also show the answer in the ...< µ < ... format. (d) Using Excel, given a production run of size N=200 and the sample size of n=30, compute the number...
Chapter 6, Section 2-CI, Exercise 110 What Influences the Sample Size Needed? In this exercise, we...
Chapter 6, Section 2-CI, Exercise 110 What Influences the Sample Size Needed? In this exercise, we examine the effect of the confidence level on determining the sample size needed. Find the sample size needed to give a margin of error within +4 with 99% confidence. With 95% confidence. With 90% confidence. Assume that we use õ= 25 as our estimate of the standard deviation in each case. Round your answers up to the nearest integer. 99% :n 95%: n =...
A sample of size n=95 is drawn from a population whose standard deviation iso = 38. Part 1 of 2 (a) Find the margin of error for a 90% confidence interval for u. Round the answer to at least three decimal places. The margin of error for a 90% confidence interval for p is Part 2 of 2 (b) If the sample size were n = 62, would the margin of error be larger or smaller? (Choose one) , because...
Score: 0 of 1 pt For the provided sample mean, sample size, and population standard deviation, complete parts (a) through (c) below. x#21,n-100, σ 2 Find a 95% confidence interval for the population mean. The 95% confidence interval is from | | to (Round to two decimal places as needed.) Enter your answer in the edit fields and then click Check Answer. parts remaining
It is known that the population standard deviation for the IQ test is 14. What sample size would be needed to collect in order to calculate a 95% CI for the mean that is within 0.08 points? What sample size would be needed to collect in order to calculate a 98% CI for the mean that is within 1 point?
Chapter 6, Section 2-CI, Exercise 110 What Influences the Sample Size Needed? In this exercise, we examine the effect of the confidence level on determining the sample size needed. Find the sample size needed to give a margin of error within +4 with 99% confidence. With 95% confidence. With 90% confidence. Assume that we use õ= 25 as our estimate of the standard deviation in each case. Round your answers up to the nearest integer. 99% :n 95%: n =...
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