If the mean of a data series is 20 and the standard deviation is 5, what is the 95% confidence interval.
95% confidence interval would lie between:
20 - 1.96 x 5 and 20 + 1.96 x 5
ie between: 10.2 and 29.8
If the mean of a data series is 20 and the standard deviation is 5, what...
2. For the following data: 1 2 3 4 5 5 6 16 20 18 17 18 21 1. Calculate the sample mean and sample variance b. Calculate the probability that the population mean is between 9 and 10 if the population standard deviation is known to be 2.3. c. What is the 95% confidence interval for the population mean if the population standard deviation is known to be 2.32 d. Calculate the 95% confidence interval using the sample standard...
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
For the following data: 1 2 3 4 5 6 16 20 18 17 18 21 a. Calculate the sample mean and sample variance b. Calculate the probability that the population mean is between 9 and 10 if the population standard deviation is known to be 2.3. What is the 95% confidence interval for the population mean if the population standard deviation is known to be 2.3? d. Calculate the 95% confidence interval using the sample standard deviation. c.
2. For the following data: 1 2 3 4 5 6 16 20 18 17 18 21 a. Calculate the sample mean and sample variance b. Calculate the probability that the population mean is between 9 and 10 if the population standard deviation is known to be 2.3. What is the 95% confidence interval for the population mean if the population standard deviation is known to be 2.3? d. Calculate the 95% confidence interval using the sample standard deviation. c.
Assume that a normal distribution of data has a mean of 20 and a standard deviation of 5. Use 68 - 95 - 99.7 rule to find the percentage of values that lie above 15. What is the percentage of values lie above 15?
Given a sample mean=13.24; sample standard deviation=3.40; estimated standard error of the mean=0.567; margin of error for 95% confidence interval for estimating the population mean=1.151. What is the upper bound of the 95% confidence interval? (Enter the value with 3 decimal places in the form ##.###)
dy/ You are given the sample mean and the population standard deviation Use this information to construct the 90% and 95% confidence intervals for the population mean Interpret the results and compare the widths of the confidence intervals From a random sample of 77 dates, the mean record high daily temperature in a certain city has a mean of 86.94°F Assume the population standard deviation is 15.31°F tiol scribe The 90% confidence interval is (1.1) (Round to two decimal places...
Sample Size = 500 Standard Deviation = 10.68981 Sample Mean = 19.51056 a.) What are the end points of a 90% confidence interval for the population mean? (round to 3 digits after Decimal point) b.) What are the end points of a 95% confidence interval fro the population mean? (round to 3 digits after Decimal point)
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...
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals. A random sample of 45 home theater systems has a mean price of $127.00. Assume the population standard deviation is $19.20. Construct a 90% confidence interval for the population mean. The 90% confidence interval...