9. A machine produces metal rods used in an automobile. A random sample of 6 rods is selected and the diameter is measured. The resulting data are as follows: 7.24, 7.21, 7.23, 7.25, 7.26, 7.23 (a) calculate the point estimate b Find a 98% confidence interval on mean rod diameter (c) ) Find a 94% confidence interval on standard deviation rod diameter

9. A machine produces metal rods used in an automobile. A random sample of 6 rods is selected and the diameter is measured. The resulting data are as follows: 7.24, 7.21, 7.23, 7.25, 7.26, 7.23 (a) calculate the point estimate b Find a 98% confidence interval on mean rod diameter (c) ) Find a 94% confidence interval on standard deviation rod diameter

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

You want to estimate the mean weight of quarters in circulation. A sample of 60 quarters has a mean weight of 5.682 grams and a standard deviation of 0.061 gram. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. The estimate for the mean weight of all quarters is (Round to three decimal places as needed.) grams. Find the 95% confidence interval for the mean weight of all quarters. grams < p< grams (Round to three decimal places as needed.)
6. You randomly select and weigh 27 samples of an allergy medication. The sample standard deviation is 1.22 milligrams. Assuming the weights are normally distributed, construct 90% confidence intervals for the population variance and standard deviation. Please interpret your result.
Compute a 95% confidence interval for the true population mean given the following 10 data that represent a sample of ceramics vessels with the following rim diameters (in centimeters), the sample mean to be x̄ = 15.3 cm and the sample standard deviation is s = 3.5 cm
A random sample of 25 observations selected from this population gave a mean equal to 143.72. The population is known to have a normal distribution with the standard deviation of 14.8. Using a 95% confidence level. Determine the following : a) the reliability factor. b) standard error. c) point estimate of mean d) confidence interval of mean.
3. A researcher has collected the blood samples of 29 individuals and found that the mean hemoglobin concentration for the sample of individuals is 13.9 grams per deciliter and the standard deviation is 1.43 grams per deciliter. Calculate a 95% confidence interval for the mean hemoglobin concentration for the population.A) (13.36, 14.44)B) (13.38, 14.42)C) (10.98, 16.82)D) (11.10, 16.70)
Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to two decimals. 13) A random sample of 100 individuals, their blood glucose level has been measured, obtaining a mean of 120 mg/dl and a standard deviation of 30 mg/dl. a) What is the best point estimate of the population mean? b) Construct a 95% confidence interval for the mean blood glucose level of all individuals in this population.
aro. For 30 randomly selected Rolling Stones concerts, the mean gross earnings is 2.99 million dollars. Part a) Assuming a population standard deviation gross earnings of 0.48 million dollars, obtain a 99% confidence interval for the mean gross earnings of all Rolling Stones concerts (in millions). Confidence interval: (
14.) A researcher would like to estimate the mean weight of all adult female American alligators in the Everglades. The mean weight of a random sample of 146 adult female American alligators from the Everglades was found to be 217 pounds. The standard deviation of the weights of all adult female American alligators in the Everglades is known to be 16 pounds.Using a 96% confidence level, determine the margin of error, EE, and a confidence interval for the mean weight of all adult female American alligators in the Everglades. Report the confidence interval using interval notation. Round solutions to two decimal places, if necessary.The margin of error is given by E= ___A 96% confidence interval is given by ___
6. In Roosevelt National Forest, the rangers took random samples of live a) aspen trees and measured the base circumference of each tree. A sample of 36 trees had a mean circumference of 15.71 inches and a population standard deviation of 4.63 inches. Find a 98% confidence interval for the mean circumference of all aspen trees in Roosevelt National Forest from this data. b) 16.475) inches. What confidence level was used to produce this interval? Suppose a confidence interval constructed from this data was (14.945,