in a study of pain relievers, 100 people were given product a, and all but 27 experienced relief. in the same study, 25 people were given product b, and all but 9 experienced relief. Product A or B choose one performed better in the study. That is only because only __% failed to get relief with this product, whereas __% failed to get relief with product a or b choose o

in a study of pain relievers, 100 people were given product a, and all but 27 experienced relief. in the same study, 25 people were given product b, and all but 9 experienced relief. Product A or B choose one performed better in the study. That is only because only % failed to get relief with this product, whereas % failed to get relief with product a or b choose o

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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In a study of pain relievers, 25 people were given product A, and all but 6 experienced relief. In the same study 100 people were given product B, and all but 18 experienced relief. Product ? performed worse in the study because ?% failed to get relief with this product, whereas only ?% failed to get relief with Product ?
A study showed that 64% of supermarket shoppers believe supermarket brands to be as good as national name brands. To investigate whether this result applies to its own product, the manufacturer of a national name-brand ketchup asked a sample of shoppers whether they believed that supermarket ketchup was as good as the national brand ketchup. Only B
In a study of pain relievers, 20 people were given product A, and all but 7 experienced relief. In the same study, 100 people were given product B, and all but 27 experienced relief. Please help me feel in the blanks Product--performed worse in the study because --% failed to get relief with this product, whereas only--- % failed to get relief with Product?
In a study of chromosomal anomalies observed in a randomly selected sample of 1200 infertile men with either a zero or low sperm count, a team of researchers assigned the value of 1 for the presence of any chromosomal anomaly in the subject's sperm and the value of 0 for the absence of all chromosomal anomalies in the subject's sperm.Of the 600 men with zero sperm count, 48 had chromosomal anomalies. Of the 600 men with low sperm count, 15 had chromosomal anomalies. The researchers would like to test the hypothesesHo: P1 = P2Ha: P1 does not equal P2where p₁ the true proportion of all men with zero sperm count that have chromosomal anomalies and p₂ = the true proportion of all men with low sperm count that have chromosomal anomalies.What is the z standardized test statistic, for this test?
Suppose that 60% of all students who have to buy a text for a particular course want a new copy, whereas the others want a used copy. Consider randomly selecting 15 purchasers, is a result of 12 a significantly high value for people who want a used copy of the book?
The article “A ‘White’ Name Found to Help in Job Search” (AP, 1/15/03) described an experiment to investigate if it helps to have a white-sounding first name when looking for a job. Researchers sent 5000 resumes in response to ads that appeared in the Boston Globe and Chicago Tribune. The resumes were identical except the 2500 of them had “white-sounding” first names, such as Brett and Emily, whereas the other 2500 had “black-sounding” names such as Tamika and Rasheed. Resumes of the first type elicited 300 responses and resumes of the second type only 167 responses. Does this data support the theory that the proportion receiving positive responses is higher by more than 10% for those resumes with “white-sounding” first names? Use a significance level of .05.
Mendelian Genetics Experiments are conducted with hybrids of two types of peas. If the offspring follow Mendel’s theory of inheritance, the seeds that are produced are yellow smooth, green smooth, yellow wrinkled, and green wrinkled, and they should occur in the ratio of 9:3:3:1, respectively. An experiment is designed to test Mendel’s theory, with the result that the offspring seeds consist of 307 that are yellow smooth, 77 that are green smooth, 98 that are yellow wrinkled, and 18 that are green wrinkled. Use a 0.05 significance level to test the claim that the results contradict Mendel’s theory.
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 642642 employed persons and 745745 unemployed persons are independently and randomly selected, and that 376376 of the employed persons and 300300 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2p2 ), who have registered to vote? Use a significance level of α=0.1α=0.1 for the test. Step 1 of 6: State the null and alternative hypotheses for the test. Step 2 of 6: Find the values of the two sample proportions, pˆ1p^1 and pˆ2p^2. Round your answers to three decimal places. Step 3 of 6: Compute the weighted estimate of p, p‾‾p‾. Round your answer to three decimal places. Step 4 of 6: Compute the value of the test statistic. Round your answer to two decimal places. Step 5 of 6: Determine…
The manufacturer of the ColorSmart-5000 television set claims that 95 percent of its sets last at least five years without needing a single repair. In order to test this claim, a consumer group randomly selects 400 consumers who have owned a ColorSmart-5000 television set for five years. Of these 400 consumers, 316 say that their ColorSmart-5000 television sets did not need repair, while 84 say that their ColorSmart-5000 television sets did need at least one repair. Formulate the null and alterative hypotheses that the consumer group should use to attempt to show that the manufacturer’s claim is false. Use the critical value approach to test the hypotheses by setting α equal to 0.10 and 0.001.
According to a local chamber of commerce, in 1993, 5.9% of local area residents owned more than five cars. A local car dealer claims that the percentage has increased. He randomly selects 180 local area residents and finds that 12 of them own more than five cars. Test this car dealer's claim at the level of significance of 0.05.
As part of a study on how people of different ages use mobile technology, each person in a sample of 258 cell phone users age 20 to 39 was asked if they use their cell phones to stay connected while they are in bed. The same question was also asked of each person in a sample of 129 cell phone users age 40 to 49. In the 20 to 39 years age group, 168 people indicated that they do stay connected while they are in bed, whilst in the 40 to 49 years old age group, 61 people stay connected while in bed.Let: ??̂ 1 = Proportion of cell phone users age 20 to 39 who stay connected while they are in bed ??̂ 2 = Proportion of cell phone users age 40 to 49 who stay connected while they are in bed ??̂= Pooled proportion of cell phone users who stay connected while they are in bed