A sample of size 144 drawn from a large population has a sample mean of 47 and a sample standard deviation of 8. What is the? 95% confidence interval for the population? mean? Round to one decimal place as needed.
95% confidence interval for
is
- t * S / sqrt(n) <
<
+ t * S / sqrt(n)
47 - 1.977 * 8 / sqrt(144) <
< 47 + 1.977 * 8 / sqrt(144)
45.7 <
< 48.3
95% CI is (45.7 , 48.3)
A sample of size 144 drawn from a large population has a sample mean of 47...
A simple random sample of size n equals = 18 is drawn from a population that is normally distributed. The sample mean is found to be x overbar equals 54 and the sample standard deviation is found to be s equals = 19 Construct a 95% confidence interval about the population mean. The 95% confidence interval is ( _____ , _____ ). (Round to two decimal places as needed.)
A simple random sample of size n=40 is drawn from a population. The sample mean is found to be x overbar equals 120.7 and the sample standard deviation is found to be s=12.1. Construct a 99% confidence interval for the population mean. The lower bound is ________ (Round to two decimal places as needed.) The upper bound is ________ (Round to two decimal places as needed.)
A simple random sample of size n=40 is drawn from a population. The sample mean is found to be x overbar equals 120.7 and the sample standard deviation is found to be s=12.1. Construct a 99% confidence interval for the population mean. The lower bound is ________ (Round to two decimal places as needed.) The upper bound is ________ (Round to two decimal places as needed.)
simple random sample of size n= 40 is drawn from a population. The sample mean is found population mean. be x 120.6 and the sample standard deviation is found to be s 12.6. Construct a 99% confidence interval for the The lower bound is (Round to two decimal places as needed.)
Asimple random sample of sien population mean is drawn from a population. The sample mean is found to bex=1208 and the sample standard deviation is found to be s 126. Construct a 90% confidence interval for the The lower bound is The upper bound is (Round to two decimal place is needed) Round to two decimal places as needed.)
A simple random sample of size nis drawn from a population that is normally distributed the sample mean is found to be 113, and the sample standard deviations, is found to be 10 (a) Construct a 95% confidence interval about if the sample size is 22 (b) Construct a 95% confidence interval about the sample on 26 (c) Construct a 90% confidence interval about the sample size is 22 (d) Could we have computed the confidence intervals in parts(a-c) if...
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 113, and the sample standard deviation, s, is found to be 10 (a) Construct a 95% confidence interval about if the sample size, n, is 25. (b) Construct a 95% confidence interval about if the sample size, n, is 13 (c) Construct a 90% confidence interval about if the sample size, n, is 25. (d) Could...
A simple random sample of size n-23 is drawn from a population that is normally distributed. The sample mean is found to be x = 63 and the sample standard deviation is found to be s 18. Construct a 95% confidence interval about the population mean. The lower bound is The upper bound is (Round to two decimal places as needed.)
9.3
A simple random sample of size n=24 is drawn from a population that is normally distributed. The sample mean is found to be x = 68 and the sample standard deviation is found to be s = 13. Construct a 95% confidence interval about the population mean. The lower bound is The upper bound is (Round to two decimal places as needed.)
Please help!
A simple random sample of size n=20 is drawn from a population that is normally distributed. The sample mean is found to be x = 59 and the sample standard deviation is found to be S = 11. Construct a 95% confidence interval about the population mean. The lower bound is . The upper bound is . (Round to two decimal places as needed.)