A hospital director believes that 46% of the lab reports contain errors. A sample of 250 tubes found 95 errors. Is there sufficient evidence at the 0.05 level to refutethe hospital director's claim?State the null and alternative hypotheses for the above scenario.

In hypothesis testing, we start by stating the null hypothesis (H0) and the alternative hypothesis…

Answered: A hospital director believes that 46%…

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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A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 418 gram setting. Is there sufficient evidence at the 0.05 level that the bags are overfilled? Assume the population is normally distributed. State the null and alternative hypotheses for the above scenario.
A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 408 gram setting. Is there sufficient evidence at the 0.02 level that the bags are overfilled? Assume the population is normally distributed. State the null and alternative hypotheses for the above scenario.
In a study of the accuracy of fast food drive-through orders, one restaurant had 30 orders that were not accurate among 385 orders observed. Use a 0.10 significance level to test the claim that the rate of inaccurate orders is equal to 10%. Does the accuracy rate appear to be acceptable? Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p=0.1 H1:p>0.1 O B. Ho: p=0.1 H:p<0.1 OC. Ho: p 0.1 H1:p=0.1 D. Ho: p=0.1 H:p#0.1 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is - 1.44 . (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is (Round to three decimal places as needed.)
In a previous study, it was found that p hat=.73 for a particular sample. Suppose we would like to repeat this study. Give the sample size n, required to have the margin of error equal to .01, at the 98% confidence level.
Two different simple random samples are drawn from two different populations. The first sample consists of 20 people with 10 having a common attribute. The second sample consists of 2200 people with 1597 of them having the same common attribute. Compare the results from a hypothesis test of p1= p2 (with a 0.01 significance level) and a 99% confidence interval estimate of p1− p2.
Two different simple random samples are drawn from two different populations. The first sample consists of 40 people with 22 having a common attribute. The second sample consists of 1900 people with 1375 of them having the same common attribute.compare results from a hypothesis test of p1-=p2 with a 0.05 significance level and a 95% confidence interval estimate of p1-p2 .
In a study of the accuracy of fast food drive-through orders, one restaurant had 31 orders that were not accurate among 355 orders observed. Use a 0.10 significance level to test the claim that the rate of inaccurate orders is equal to 10%. Does the accuracy rate appear to be acceptable? Question content area bottom Part 1 Identify the null and alternative hypotheses for this test. Choose the correct answer below. A. H0: p≠0.1 H1: p=0.1 B. H0: p=0.1 H1: p<0.1 C. H0: p=0.1 H1: p≠0.1 Your answer is correct. D. H0: p=0.1 H1: p>0.1 Part 2 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is negative 0.80−0.80. (Round to two decimal places as needed.) Part 3 Identify the P-value for this hypothesis test. The P-value for this hypothesis test is 0.4240.424. (Round to three decimal places as needed.) Part 4 Identify the conclusion for this hypothesis test.…
A hospital director believes that above 55% of the lab reports contain errors and feels an audit is required. A sample of 120 reports found 72 errors. Is there sufficient evidence at the 0.02 level to substantiate the hospital director's claim? State the null and alternative hypotheses for the above scenario.
A national poll found that 73% of US adults could distinguish the definition of astrology from astronomy. Hoping that the percentage for TU students is higher, the SGA polls a random sample to test the hypotheses where p = the true proportion of TU students who can distinguish the definition of astrology from astronomy. If the decision is "do not reject the null", the correct concluson to the hypothesis test is... There is convincing evidence that the proportion of TU students who can distinguish the definition of astrology from astronomy is more than 73%. There is not enough evidence to conclude that the proportion of TU students who can distinguish the definition of astrology from astronomy is more than 73%. There is convincing evidence that the proportion of TU students who can distinguish the definition of astrology from astronomy is equal to 73%. There is not enough evidence to conclude that the proportion of TU students who can…
A consumer agency estimate the proportion of all drivers who wear seat belts while driving. What is the most conservative estimate of the sample size that would limit the margin of error to within 0.06 of the population proportion for a 99 % confidence interval ?
Suppose that 90% confidence interval for the difference between two proportions, p1-p2, is ( 0.013, 0.245). If we were testing the following hypotheses: H0: p1=p2 versus H1: p1≠p2 at the .10 significance level we would

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A hospital director believes that 46% of the lab reports contain errors. A sample of 250 tubes found 95 errors. Is there sufficient evidence at the 0.05 level to refute the hospital director's claim? State the null and alternative hypotheses for the above scenario.