0 nine out of ten dentists recommend this toothpaste. You have…
Question Answered step-by-step 0 nine out of ten dentists recommend this toothpaste. You have… 0 nine out of ten dentists recommend this toothpaste. You have certainly heard the above claim before. Advertisers frequently claim that some percentage of doctors or dentists recommend a given health product. It’s best to take such claims with a large grain of salt.Suppose a recent advertisement claims that 9 out of 10 dentists (90%) recommend a certain. Brand of toothpaste. A consumer advocacy group is highly suspicious of this claim and randomly surveys 299 dentists. They find that 92.1% of the sample recommends the given brand of toothpaste.Using a significance level of 2%, test the hypothesis that the proportion of all students who recommend this brand of toothpaste is different than 90%. State the thanks and alternative hypothesis for this test.Ho:? = H1:? = Determine the critical value(s) for this hypothesis test. Round the solution(s) to two decimal places. If more than one critical value exists, enter the solutions using a comma-separated list.= Determine the test statistic. Round the solution to two decimal places.2- covid-19 took the world by surprise in late 2019. By early 2020, nearly all countries worldwide we’re affected.Early reports have claimed that a large percentage of those infected with the corona virus were asymptomatic. The rate of asymptomatic infections is important, since such people can unwittingly spread the virus to those around them. Suppose the U.S. Centers for Disease Control and Prevention needs to estimate the proportion of the infected population that is also asymptomatic. A random sample of 1480 infected patients is examined and 418 are observed to be asymptomatic. Using a 97% confidence level, determine the margin of error, E, and a confidence interval for the proportion of all patients who are infected with the corona virus and are also asymptomatic. Report the confidence interval using interval notation. Round solutions to four decimal places, if necessary. The margin of error is given by E = A 97% confidence interval is given by=— Math Statistics and Probability STA 2023 Share QuestionEmailCopy link Comments (0)
