Ball bearings are manufactured by a process that results in a standard deviation in diameter of 0.045 inch.Suppose the average diameter in a simple random sample of 42 tested ball bearings is 0.52 inches.Construct and interpret a 92% confidence interval for the mean diameter of all ball bearings produced usingthe process.i. Procedure: Select an answerくii. Assumptions: (select everything that applies)☐ Normal populationSimple random sampleThe number of positive and negative responses are both greater than 10Sample size is greater than 30Population standard deviation is unknownPopulation standard deviation is knowniii. Unknown parameter: Select an answer

The given values are:Sample size (n) = 42Sample mean (x̄) = 0.52 inchesStandard deviation (σ) =…

Answered: Ball bearings are manufactured by a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An emergency planning administrator needs an estimate of the mean weight of relief vehicles when fully loaded. She selects a random sample of 500 trucks and finds a mean of 12.2 tons with a sample standard deviation of 2.9 tons. The width of the 95 percent confidence interval for the population mean is (enter the correct answer rounding to two significant digits (e.g. 3.14)) ?
Salaries of 40 college graduates who took a statistics course in college have a mean, x overbar, of $64,200. Assuming a standard deviation, σ, of $12,042, construct a 95% confidence interval for estimating the population mean μ.
Sample Size: Calculate the sample size. Karen from Big Chip cookie company discovered that on average her cookies have 12.9 chocolate chips with a standard deviation of 3.4 chocolate chips. If she wants to reduce the error for a 99% confidence interval to 1 chocolate chip, how many cookies should she sample?
You measure 25 randomly selected textbooks' weights, and find they have a mean weight of 73 ounces. Assume the population standard deviation is 5.8 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight.
Which of the following terms is added and subtracted to the sample mean in order to obtain a 90% confidence interval containing the population mean? 1.960 Vn 1.645o 1.645- 1.960o
A study by the International Coffee Organisation found that persons aged 30 – 59 drank an average of 0.57 cups of coffee per day. Assuming that the sample size is 200 with a sample standard deviation of 0.4 cups, construct a 95% confidence interval for the population mean cup of coffee. Interpret your answer.
Sample size 42, mean. 53.1, and standard deviation 8.2 An 80% confidence interval for population mean is
In a random sample of ten people, the mean driving distance to work was 22.5 miles and the standard deviation was 5.6 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean u. Interpret the results. Identify the margin of error. (Rou e as needed.) Con square miles interval for the population mean. miles (Rou miles per hour e as needed.) Interpret the results. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) OA. % of all random samples of ten people from the population will have a mean driving distance to work (in miles) that is between the interval's endpoints. B. With % confidence, it can be said that the population mean driving distance to work (in miles) is between the interval's endpoints. O C. It can be said that % of the population has a driving distance to work (in miles) that is…
Construct a 90% confidence interval for the population mean, μ . Assume the population has a normal distribution. A sample of 15 randomly selected students has a grade point average of 2.81 with a standard deviation of 0.63 .
The mean diameter of a ball bearing produced by a certain manufacturer is 0.60 cm with a standard deviation of 0.04 cm. A sample of 25 ball bearings is randomly selected from a production run. The sample had a mean of 0.60008 and a median 0.60333. What is the standard error for the sample mean? O A. 0.00032 O B. 0.008 O C. 0.0016 O D. 0.00008 O E. 0.00333
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96
Find Test Statistic, P value, and Z score.

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