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the amount of their salary after tive years. The sample mearr tion standard deviation...
You want to estimate the mean salary of people in a country, so you take a random sample of 81 people from around the country
You want to estimate the mean salary of people in a country, so you take a random sample of 81 people from around the country. The sample had an average salary of 8450.00 dollars with population standard deviation of 500.00 dollars. Calculate the Lower Limit of the 99% confidence interval for the mean salary of the people in the country. Reminder: You only need to calculate the Lower Limit of the confidence interval. _______
You are given the sample mean and the popd tion standard deviation Use this information to...
You are given the sample mean and the popd tion standard deviation Use this information to con truct the 90% and 95% cor lidence intervall th interval From a random sample of 43 business days, the mean closing price of a certain stock was $117.42 Assume the population standard deviation is $10 The 90% confidence interval is Round to two decimal places as 0 Enter your answer in the edit fields and then click Check Answer Clear All remaining Type...
2. A population is known to have a standard deviation of 26.1. A sample space of...
2. A population is known to have a standard deviation of 26.1. A sample space of 35 items has a mean of (1 point) 562. Construct a 90% confidence interval estimate of the mean of the population. 0566<p<558 0555<pバ569 O 551<H573 0561<p<563 3. While researching the cost of school lunches per week across the state, you use a sample size of 45(point) weekly lunch prices. The standard deviation is known to be 68 cents. In order to be 90% confident,...
A sample of 49 observations is taken from a normal population with a standard deviation of 10. The sample mean is 55.
A sample of 49 observations is taken from a normal population with a standard deviation of 10. The sample mean is 55. Determine the 99% confidence interval for the population mean. (Round your answers to 2 decimal places.) Confidence interval for the population mean is _______ and _______ .A research firm conducted a survey to determine the mean amount Americans spend on coffee during a week. They found the distribution of weekly spending followed the normal distribution with a population standard deviation...
A sample of 250 observations is selected from a normal population for which the population. standard deviation is known to be 25.
2) A sample of 250 observations is selected from a normal population for which the population. standard deviation is known to be 25. The sample mean is 20 .a. Determine the standard error of the mean.b. Determine the 95 %confidence interval for the population mean.
2. Suppose that in a random sample of 50 adults, 41 were registered to vote. Construct...
2. Suppose that in a random sample of 50 adults, 41 were registered to vote. Construct a 95% confidence level interval for the population proportion of registered voters 3. The mean age of sample of 100 cars from a certain manufacturer is found to be eleven years. If the sample standard deviation of car ages is 5 years, give a 99% confidence interval for the mean age of cars from this manufacturer.
A simple random sample with n = 50 provided a sample mean of 23.5 and a sample standard deviation of 4.2.
A simple random sample with n = 50 provided a sample mean of 23.5 and a sample standard deviation of 4.2. a. Develop a 90% confidence interval for the population mean (to 1 decimal). b. Develop a 95% confidence interval for the population mean (to 1 decimal). c. Develop a 99% confidence interval for the population mean (to 1 decimal). d. What happens to the margin of error and the confidence interval as the confidence level is increased?
A sample of 31 students in normally distributed with a mean age of 22.6 years and a standard deviation of 1.6 years. Con...
A sample of 31 students in normally distributed with a mean age of 22.6 years and a standard deviation of 1.6 years. Construct a 95% confidence interval for the population standard deviation of student ages. Round the boundaries to two decimal places.
For n = 121, sample mean = 96 and a known population standard deviation = 14,...
For n = 121, sample mean = 96 and a known population standard deviation = 14, construct a 95% confidence interval for the population mean.
1. construct a 95% confidence interval where standard deviation is 15 and mean is 99.133 2....
1. construct a 95% confidence interval where standard deviation is 15 and mean is 99.133 2. construct a 95% confidence interval where standard deviation is 15 and mean is 99 3. construct a 95% confidence interval where standard deviation is 15 and mean is 98.625 i want to add that the population mean is 100 question 1- sample size is 8 question 2- sample size is 20 question 3- sample size is 30
You are given the sample mean and the popd tion standard deviation Use this information to con truct the 90% and 95% cor lidence intervall th interval From a random sample of 43 business days, the mean closing price of a certain stock was $117.42 Assume the population standard deviation is $10 The 90% confidence interval is Round to two decimal places as 0 Enter your answer in the edit fields and then click Check Answer Clear All remaining Type...
2. A population is known to have a standard deviation of 26.1. A sample space of 35 items has a mean of (1 point) 562. Construct a 90% confidence interval estimate of the mean of the population. 0566<p<558 0555<pバ569 O 551<H573 0561<p<563 3. While researching the cost of school lunches per week across the state, you use a sample size of 45(point) weekly lunch prices. The standard deviation is known to be 68 cents. In order to be 90% confident,...
2. Suppose that in a random sample of 50 adults, 41 were registered to vote. Construct a 95% confidence level interval for the population proportion of registered voters 3. The mean age of sample of 100 cars from a certain manufacturer is found to be eleven years. If the sample standard deviation of car ages is 5 years, give a 99% confidence interval for the mean age of cars from this manufacturer.
A simple random sample with n = 50 provided a sample mean of 23.5 and a sample standard deviation of 4.2. a. Develop a 90% confidence interval for the population mean (to 1 decimal). b. Develop a 95% confidence interval for the population mean (to 1 decimal). c. Develop a 99% confidence interval for the population mean (to 1 decimal). d. What happens to the margin of error and the confidence interval as the confidence level is increased?
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