The value of t can be seen from t tables.
A machine produces metal pieces that are cylindrical in shape. A sample of pieces is taken,...
A machine produces metal pieces that are cylindrical in shape. A sample of pieces is taken, and the diameters are found to be 1.01, 0.97, 0.95, 1.04, 0.97, 0.98, 1.03, 1.01, and 1.06 centimeters. Find a 99% confidence interval for the mean diameter of pieces from this machine, assuming an approximately normal distribution. The confidence interval is ___<mu<___ (Round to three decimal places as needed.)
Please, i need clear answer for this statistics question Problem 6 A machine produces metal pieces that are cylindrical in shape. A sample of these pieces is taken and the diameters are found to be 1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 0.99, 1.01 and 1.03 centimeters. The sample mean and standard deviation for the given data are i-1.0056 and s = 0.0246. Assume normality. (a) Find a 99% confidence interval on the mean diameter (b) Compute a 99% prediction interval...
Consider a machine that produces metal pieces which are cylindrical in shape. We select a sample of nine pieces and measure the diameters: 1.01; 0.97; 1.03; 1.04; 0.99; 0.98; 0.99; 1.01; 1.03 The sample and sample standard deviation are x̄ = 1.00556 and s = 0.02455, respectively. Give a 95% confidence interval for the true mean diameter, assume that the population is normal.
Consider a machine that produces metal pieces which are cylindrical in shape. We select a sample of nine pieces and measure the diameters: 1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 0.99, 1.01, 1.03 The sample and sample standard deviation are T = 1.00556 and s = 0.02455, respec- tively. Give a 95% confidence interval for the true mean diameter, assume that the population is normal. A. (0.989,1.022] B. (0.978,1.033] C. (0.991,1.034] D. (0.987,1.024] E. none of the preceding
In a factory, a machine produces cylindrical metal pieces. A random sample of the pieces yields diameters 1.01,0.97, 1.03, 1.04,0.99, 0.98,0.99, 1.04, 1.03, 1.01. Determine a 99% confidence interval for the mean diameter. You may assume the diameters are normally distributed. A. (0.989, 1.022) B. 10.983, 1.035] C. 10.991, 1.034] D. 0.987, 0.024 E none of the above
A sample of call duration between different UPRM students is found to be 1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 0.99, 1.01, and 1.03 minutes. Calculate a 99% confidence interval for the mean call duration (minutes), assuming an approximately normal distribution. Select one: o b. p c. t O d. any of the above A sample of call duration between different UPRM students is found to be 1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 0.99, 1.01, and 1.03 minutes. Calculate a 99%...
1. The numbers of incorrect answers on a true false competency test for a random sample of 15 students were recorded as follows: 2, 1,3,0, 1, 3, 6, 0,3,3,5, 2, 1, 4, and 2. Find (a) the mean; (b) the median; (c) the mode. 2. The grade-point averages of 20 college seniors selected at random from a graduating class are as follows: 3.2 1.9 2.7 2.4 2.8 2.9 3.8 3.0 2.5 3.3 1.8 2.5 3.7 2.8 2.0 3.2 2.3 2.1...
A machine produces metal rods used in an automobile suspension system. A random sample of 15 rods is selected, and the diameter is measured. The resulting data (in millimeters) are as follows: 8.20 8.25 8.18 8.25 8.22 8.20 8.28 8.28 8.18 8.24 8.25 8.25 8.17 8.26 8.22 8-80 Consider the suspension rod diameter measurements described in Exercise 8-40 (use the modified data of 8-40 as given in Chapter 8 homework problems), compute a 99% prediction interval on the diameter of...
1. A machine produces metal rods used in an automobile suspension system. A random sample of 15 rods is selected, and the diameter is measured (in millimeters). Diameter 8.24 8.21 8.23 8.25 8.26 8.23 8.2 8.26 8.19 8.23 8.2 8.28 8.24 8.25 8.24 Using RStudio, find and interpret a 95% confidence interval (CI) for the true mean diameter (in millimeters) of metal rods used in an automobile suspension system. Label the parameter: (4 points) Propose an appropriate confidence interval. Explain!...
1. A machine produces metal rods used in an automobile suspension system. A random sample of 15 rods is selected, and the diameter is measured. The resulting data (in millimeters) are as follows: 11.44 11.39 11.35 11.38 11.45 11.4311.4211.44 11.34 11.39 11.46 11.36 11.44 11.49 11.41 a) Use a Normal Probability Plot to check the assumption of normality for rod diameter. b) Is it believable the mean rod diameter is less than 1 1.50 mm? Construct the appropriate 99% confidence...