A sample of 900 computer chips revealed that 46 % of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 50 %of the chips do not fail in the first 1000 hours of their use. The quality control manager wants to test the claim that the actual percentage that do not fail is differentfrom the stated percentage. Find the value of the test statistic. Round your answer to two decimal places.AnswerTablesKeypad

Given,Sample size, n = 900Sample proportion, = 46% = 0.46The company's promotional literature…

Answered: A sample of 900 computer chips revealed…

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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You want to estimate the percentage of statistics students who get grades of C or better. How many students should you survey to be 95% confident that the sample percentage is off by no more than 2 percentage points.
Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 90% confidence that your error is no more than 0.035. A Click the icon to view the discussion of sample size. The sample should include men and women. (Type whole numbers.)
Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 95% confidence that your error is no more than 0.02. A Click the icon to view the discussion of sample size. The sample should include men and women. (Type whole numbers.) Sample size discussion The sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1-a can be found by using the following expression: P191 P292 E=Za/2 n1 n2 Replace n, and n2 by n in the preceding formula (assuming that both samples have the same size) and replace each of p,, 9,, P2, and q2 by 0.5 (because their values are not known). Solving for n results in this expression: a/2 n = 2E? Print Done
A hospital director is told that 54 % of the treated patients are insured. The director wants to test the claim that the percentage of insured patients is less than the expected percentage. A sample of 280 patients found that 140 were insured. Find the value of the test statistic. Round your answer to two decimal places. Answer How to enter your answer (opens in new window) Keypad Keyboard Shortcuts Tables
T or F. Explain answers. a. The elementary units are also the sample units in Random Sampling (Simple). b. Z-score in statistics is a measure of location.
Find the margin of error for the survey results described. During the questioning of 82 potential jury members, 33% said that they had already formed an opinion as to the guilt of the defendant.Give your answer as a percentage to one decimal place. 1.2% 5.5% 11.0% 22.1%
Suppose a primitive economy consists of three industries: the agricultural industry, the manufacturing industry, and the fuels industry. The corresponding technology matrix is given by 5. (0.6 0.1 0.2 Agricultural A = 0.2 0.4 0.2 Manufacturing . \0.1 0.3 0.5, Fuels Using Gaussian elimination, find the gross production of each industry if a surplus of 60 units of agricultural products, 50 units of manufactured goods, and 40 units of fuels is desired.
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A teacher claims that over 9% of maths students are married. In the survey at the beginning of semester, 45 students answered the question about their marital status. 9 of them said they were married. Calculate the test statistic Z? Round answer to 2 decimals
A publisher reports that 61 % of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 320 found that 55 % of the readers owned a particular make of car. Determine the P-value of the test statistic. Round your answer to four decimal places. Answer How to enter your answer (opens in new window) Tables Keypad Keyboard Shortcuts
Use technology to calculate the P-value.
In a random sample of seven people, the mean driving distance to work was 22.5 miles and the standard deviation was 5.9 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 95% confidence interval for the population mean. (Round to one decimal place 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.) O A. With % confidence, it can be said that most driving distances to work (in miles) in the population are between the interval's endpoints. O B. It can be said that % of the population has a driving distance to work (in miles) that is between the interval's endpoints. OC. With % confidence, it can be said that the population mean driving distance to work…

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