C. Find the length of the confidence interval given standard deviation) 1. s = 2.36, n = 350, confidence level: 99%
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- Be sure to draw graphs and show answers as P( ) = . 3. Construct the confidence interval for the standard deviation of weight of men at 90% confidence. n = 14 and s = 11.2 lbs. Draw the graph.Construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed. c= 0.95, x= 12.7, s= 0.87, n= 17 (Round to one decimal place as needed.)Which of the following is equal to ???(2?+?,?−?), where ? and ? are random variables on a sample space ? ?
- K that the mean time required to graduate with a bachelor's degree is 5.44 years with a standard deviation of 1.88 years. Use a single value to estimate the mean time required to graduate for all college graduates. Also, find the 95% confidence interval for the mean time required to graduate for all college graduates. gradua The estimate for the mean time required to graduate for all college graduates is 5.44 years. (Round to two decimal places as needed.) Find the 95% confidence interval for the mean time required to graduate for all college graduates. years <μ< years (Round to two decimal places as needed.)Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed. c = 0.98, x= 12.7, s=0.54, n=18 (Round to one decimal place as needed.) 3Construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed. c= 0.95, x= 12.6, s= 3.0, n = 10 (Round to one decimal place as needed.)
- Solve for DUse the given data to find the 95% confidence interval estiate of the population mean ?μ. Assume that the population has a normal distribution. IQ scores of professional athletes:Sample size n=20Mean =106Standard deviation ?=9 ? <?< ?Construct the indicated confidence interval for the population mean µ using the t-distribution. Assume the population is normally distributed. c = 0.90, x= 12.5, s=0.89, n=14 (Round to one decimal place as needed.)
- Twenty-five wooden beams were ordered for a construction project. The sample mean and the sample standard deviation were measured: x = 320 cm, s = 8 cm. Calculated confidence interval for the mean is [316.70; 323.30]. Which confidence level was chosen? Assume distribution to be normal. O 99.9% O 90% O 95% ○ 99%3- A previous analysis of paper boxes showed that the standard deviation of their lengths is 9 millimeters. A packer wishes to find the 96% confidence interval for the average length of a box. How many boxes does he need to measure to be accurate within 3 millimeters? Z.Construct the indicated confidence interval for the population mean using the t-distribution. Assume the population is normally distributed. c=0.95, x=12.9, s=4.0 n=5