Chapter 9, Problem 9.55AC

List the sample space of each experiment. Picking a one-digit number

A study of seat belt users and nonusers yielded the randomly selected sample data summarized in the accompanying table. Use a 0.05 significance level to test the claim that the amount of smoking is independent of seat belt use. A plausible theory is that people who smoke are less concerned about their health and safety and are therefore less inclined to wear seat belts. Is this theory supported by the sample data? Click the icon to view the data table. Determine the null and alternative hypotheses. i More Info O A. Ho: The amount of smoking is dependent upon seat be H: The amount of smoking is not dependent upon sea B. Ho: The amount of smoking is independent of seat belt H4: The amount of smoking is not independent of seat Number of Cigarettes Smoked per Day 1-14 15-34 35 and over O C. Ho: Heavy smokers are not less likely than non-smoke Wear Seat Belts 183 30 47 8 H1: Heavy smokers are less likely than non-smokers to Don't Wear Seat Belts 157 17 37 11 D. Ho: Heavy smokers are less…

According to the Center for Disease Control website, in 2011 more than 18% of high school students have smoked a cigarette. An Introduction to Statistics class in Davies County, KY conducted a hypothesis test at the local high school (a medium sized–approximately 1,200 students–small city demographic) to determine if the local high school’s percentage was lower. One hundred fifty students were chosen at random and surveyed. Of the 150 students surveyed, 82 have smoked. Use a significance level of 0.05 and using appropriate statistical evidence, conduct a hypothesis test and state the conclusions. You will need to specify the appropriate hypothesis, use either the Wilson CI or prop.test in R to test the hypothesis. Please state your conclusion in the given context. For the conclusion, please use the following template. If you reject the null writeSince p-value is [write the value of your p-value] and is less than [write the value of alpha inpercent] we reject the null hypothesis at…

According to an article in Forbes magazine of April 3, 2014, 57% of students said that they did not attend the college of their first choice due to financial concerns (www.forbes.com). In a recent poll of 1600 students, 864 said that they did not attend the college of their first choice due to financial concerns. Using a 1% significance level, perform a test of hypothesis to determine whether the current percentage of students who did not attend the college of their first choice due to financial concerns is lower than 57%. a. Write the null hypothesis and the alternative hypothesis. O Ho: p = 0.57 Hạ: p 0.57 b. What is the value of the test statistics? ( round your answer to two decimal places = c. What is the p-value? ( round your answer to four deciml places) d. What is your conclusion? O Do not reject the null hypothesis. There is sufficient evidence to conclude that the the current percentage of students who did not attend the college of their first choice due to financial…

According to the Center for Disease Control website, in 2011 at least 18% of high school students have smoked a cigarette. An Introduction to Statistics class in a town conducted a hypothesis test at the local high school (a medium sized—approximately 1,200 students—small city demographic) to determine if the local high school's percentage was lower. One hundred fifty students were chosen at random and surveyed. Of the 150 students surveyed, 85 have smoked. Use a significance level of 0.05 and using appropriate statistical evidence, conduct a hypothesis test and state the conclusions.Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) State the p-value. (Round your answer to four decimal places.)

According to the Center for Disease Control website, in 2011 at least 18% of high school students have smoked a cigarette. An Introduction to Statistics class in a town conducted a hypothesis test at the local high school (a medium sized—approximately 1,200 students—small city demographic) to determine if the local high school's percentage was lower. One hundred fifty students were chosen at random and surveyed. Of the 150 students surveyed, 88 have smoked. Use a significance level of 0.05 and using appropriate statistical evidence, conduct a hypothesis test and state the conclusions.Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) State the p-value. (Round your answer to four decimal places.) State alpha. (Enter an exact number as an integer, fraction, or decimal.)

In a study of 817 randomly selected medical malpractice​ lawsuits, it was found that 495 of them were dropped or dismissed. Use a 0.01 significance level to test the claim that most medical malpractice lawsuits are dropped or dismissed. Which of the following is the hypothesis test to be​ conducted?   A. H0: p=0.5 H1: p≠0.5   B. H0: p=0.5 H1: p>0.5   C. H0: p=0.5 H1: p<0.5   D. H0: p<0.5 H1: p=0.5   E. H0: p>0.5 H1: p=0.5   F. H0: p≠0.5 H1: p=0.5 What is the test​ statistic?   z=nothing ​(Round to two decimal places as​ needed.) What is the​ P-   ​P-value= ​(Round to three decimal places as​ needed.)

According to a survey of 650 Web users from Generation​ Y, 351 reported using the Internet to download music. a. Determine the sample proportion. b. At the 5% significance​ level, do the data provide sufficient evidence to conclude that a majority of Generation Y Web users use the Internet to download​ music? Use the​ one-proportion z-test to perform the appropriate hypothesis​ test, after checking the conditions for the procedure.

A newsletter publisher believes that 48 % of their readers own a laptop. A testing firm believes this is inaccurate and performs a test to dispute the publisher's claim. After performing a test at the 0.10 level of significance, the testing firm fails to reject the null hypothesis. What is the conclusion regarding the publisher’s claim?