Part 3 of 5(c) Compute the P-value. Round the answer to at least four decimal places.7653P-valuePart 4 of 5(d) Determine whether to reject Ho.At the a= 0.05 level, rejectthe null hypothesis HoAt the α = 0.01 level, do not reject the null hypothesis HoPart: 4/5Part 5 of 5Ś(e) State a conclusion.At the a= 0.05 level of significance, there isconfidence in banks.At the a= 0.01 level of significance, there is notconfidence in banks.enough evidence to conclude that greater than 11% of U.S. adults have a great deal of▼ enough evidence to conclude that greater than 11% of U.S. adults have a great deal ofEspañol Confidence in banks: A poll conducted asked a random sample of 1201 adults in the United States how much confidence they had in banks and other financialinstitutions. A total of 159 adults said that they had a great deal of confidence. An economist claims that greater than 11% of U.S. adults have a great deal ofconfidence in banks. Can you conclude that the economist's claim is true? Use both a = 0.01 and a = 0.05 levels of significance and the P-value method with theTI-84 Plus calculator.Part 1 of 5(a) State the appropriate null and alternate hypotheses.Ho: p= .11H₁: p<.11This hypothesis test is a left-tailedPart 2 of 5Z=Xtest.S0<0 0>0XР(b) Compute the value of the test statistic. Round the answer to at least two decimal places.1.23330=03

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Answered: they had Banks: A poll institutions. 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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In a recent survey, 32% of employed U.S. adults reported that basic mathematical skills were critical or very important to their job. The supervisor of the job placement office at a 4 year college thinks this percentage has increased due to increased use of technology in the workplace. She takes a random sample of 250 employed adults and finds that 95 of them feel that basic mathematical skills are critical or very important to their job. Is there sufficient evidence to conclude that the percentage of employed adults who feel basic mathematical skills are critical or very important to their job has increased at the a=.1 level of significance? what are the null and alternative hypotheses? determine the test statistic. Z0= ? please show work and explain how to use ti 83 calc to solve
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A national standard requires that public bridges over 20 feet in length must be inspected and rated every 2 years. The rating scale ranges from 0 (poorest rating) to 9 (highest rating). A group of engineers used a probabilistic model to forecast the inspection ratings of all major bridges in a city. For the year 2020, the engineers forecast that 6% of all major bridges in that city will have ratings of 4 or below. Complete parts a and b. a. Use the forecast to find the probability that in a random sample of 7 major bridges in the city, at least 3 will have an inspection rating of 4 or below in 2020. P(x≥3)=
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In 2001, the polls found that 81% of American adults believed that there was a conspiracy in the death of President Kennedy. Assume a recent poll asked 1160 American adults if they believe there was a conspiracy in the assassination and it found that 897 believe there was a conspiracy. Does the data show that the proportion of Americans who believe in this conspiracy is now lower? Test at the 9% level. What is the correct parameter symbol for this problem? What is the wording of the parameter in the context of this problem? Fill in the correct null and alternative hypotheses:
Will improving customer service result in higher stock prices for the companies providing the better services? "when a company's satisfaction score has improved over the prior years results and is above the national average (currently 75.7), studies show its shares have a good chance of outperforming the broad stock market in the long run." The following satisfaction scores of three companies for the 4th quarters of two previous years were obtained from the American Customer satisfaction index. Assume that the scores are based on a poll of 55 customers from each company. Because the polling has been done for several years, the standard deviation can be assumed to equal 7 points in each case. Company year 1 score year 2 score Rite Aid 72 75 Expedia 78 79 J.C Penney 75 77 a. For Rite Aid is the increase in the satisfaction score from year 1 to year 2 statistically significant? use ax=.05 and null…
Chapter 9. 6)A poll surveyed 341 video gamers, and 81 of them said that they prefer playing games on a console, rather than a computer or hand-held device. An executive at a game console manufacturing company claims that the proportion of gamers who prefer consoles differs from 26 %. Does the poll provide convincing evidence that the claim is true? Use the 0.05 level of significance and the P-value method.

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