Problem 9.1TI: A medical trial is conducted to test whether or not a new medicine reduces cholesterol by 25%. State... Problem 9.2TI: We want to test whether the mean height of eighth graders is 66 inches. State the null and... Problem 9.3TI: We want to test If It takes fewer than 45 minutes (0 teach a lesson plan. State the null and... Problem 9.4TI: On a state drivers test. about .10% pass the test on the first a We want to test if more than .10%... Problem 9.5TI: Suppose the null hypothesis, H0, Is: the blood cultures contain no traces of pathogen X. State the I... Problem 9.6TI: Suppose the null hypothesis. H0. Is: a patient is not sick. Which type of error has the greater... Problem 9.7TI: “Red tide” is a bloom of poison-producing algae—a few different species of a class of plankton... Problem 9.8TI: Determine both Type I and Type II errors for the following scenario: Assume a null hypothesis, H0.... Problem 9.9TI: A normal distribution has a standard deviation of 1. We want to verify a claim that the mean Is... Problem 9.10TI: Its a Boy Genetics Labs claim their procedures improve the chances of a boy being born. The results... Problem 9.11TI: H0:=10, H0:< 10 Assume the p-value is 0.0935. What type of test is this? Draw the picture of the... Problem 9.12TI: H0:1,Ha:1 Assume the p-value is 0.1243. What type of test is this? Draw the picture of the p-value. Problem 9.13TI: H0:p=0.5,Ha:p0.5 Assume the p-value is 0.2564. What type of test is this? Draw the picture of the... Problem 9.14TI: The mean throwing distance of a football for Marco, a high school freshman quarterback, is 40 yards,... Problem 9.16TI: It is believed that a stock price for a particular company will grow at a rate of 55 per week with a... Problem 9.17TI: A teacher believes that 85% of students in the class will want to go on a field trip to the local... Problem 9.18TI: Marketers believe that 92% of adults In the United States own a cell phone. A cell phone... Problem 1P: You are testing that the mean speed of your cable Internet connection Is more than three Megabits... Problem 2P: You ate testing that the mean speed of your cable Internet connection is more than three Megabits... Problem 3P: The American family has an average of two children. What is the random variable? Describe in words. Problem 4P: The mean entry level salary of an employee at a company is $58.000. You believe it Is hIg1er for IT... Problem 5P: A sociologist claims the probability that a person picked at random in Times Square in New York City... Problem 6P: A sociologist claims the probability that a person picked at random in Times Square in New York City... Problem 7P: In a population of fish approximately 42% are female. A test is conducted to see if. in fact, the... Problem 8P: Suppose that a recent article stated that the mean time spent In jail by a first—time convicted... Problem 9P: A random survey of 75 death row Inmates revealed that the mean length of time on death row Is 17.4... Problem 10P: The National Institute of Mental Health published an article stating that In any one-year period,... Problem 11P: The mean price of mid-sized cars In a region is $32,000. A test is conducted to see if the claim is... Problem 12P: A sleeping bag Is rested to withstand temperatures of —15 °F. You think the bag cannot stand... Problem 13P: For Exercise 9.12, what are and in words? Problem 14P: In words, describe 1— 3For Exercise 9.12. Problem 15P: A group of doctors is deciding whether or not to perform an operation. Suppose the null hypothesis,... Problem 16P: A group of doctors is deciding whether or not to perform an operation. Suppose the null hypothesis,... Problem 17P: The power of a test is 0.981. What is the probability of a Type II error? Problem 18P: A group of divers is exploring an old sunken ship. Suppose the null hypothesis. H0, Is: the sunken... Problem 19P: A microbiologist is testing a water sample for E-coli. Suppose the null hypothesis. H0. is: the... Problem 20P: A microbiologist is testing a water sample for E-coli. Suppose the null hypothesis, H0, is: the... Problem 21P: Which two distributions can you use for hypothesis testing for this chapter? Problem 22P: Which distribution do you use when you are testing a population mean and the population standard... Problem 23P: Which distribution do you use when the standard deviation is not known and you are testing one... Problem 24P: A population mean Is 13. The sample mean is 12.8. and the sample standard deviation is two. The... Problem 25P: A population has a mean is 25 and a standard deviation of five. The sample mean Is 24, and the... Problem 26P: It Is thought that .12% of respondents in a taste test would prefer Brand A. In a particular test of... Problem 27P: You ate performing a hypothesis test of a single population mean using a Students t-distribution.... Problem 28P: You are performing a hypothesis test of a single population mean using a Students t-distribution.... Problem 29P: You are performing a hypothesis test of a single population proportion. What must be true about the... Problem 30P: You are performing a hypothesis test of a single population proportion. You find out that np is less... Problem 31P: You are peform1ng a hypothesis test of a single population proportion. The data come from which... Problem 32P: When do you reject the null hypothesis? Problem 33P: The probability of winning the grand prize at a particular carnival game is 0.005. Is the outcome of... Problem 34P: The probability of winning the grand prize at a particular carnival game is 0.005. Michele wins the... Problem 35P: It is believed that the mean height of high school students who play basketball on the school team... Problem 36P: The mean age of graduate students at a University is at most 31 y ears with a standard deviation of... Problem 37P: Does the shaded region represent a low or a high p-value compared to a level of significance of 1%?... Problem 38P: What should you do when a >p-value? Problem 39P: What should you do if a = p-value? Problem 40P: If you do not reject the null hypothesis, then it must be true. Is this statement correct? State why... Problem 41P: Use the blowing information to answer the next seen exeircises: Suppose that a recent article stated... Problem 42P: Use the blowing information to answer the next seen exeircises: Suppose that a recent article stated... Problem 43P: Use the blowing information to answer the next seen exeircises: Suppose that a recent article stated... Problem 44P: Use the blowing information to answer the next seen exeircises: Suppose that a recent article stated... Problem 45P: Use the blowing information to answer the next seen exercises: Suppose that a recent article stated... Problem 46P: Use the blowing information to answer the next seen exeircises: Suppose that a recent article stated... Problem 47P: Use the blowing information to answer the next seen exeircises: Suppose that a recent article stated... Problem 48P: A random survey of 75 death row inmates revealed that the mean length of time on death row is 17.4... Problem 49P: Assume H0: = 9 and H0:< 9. Is this a left-tailed, light-tailed, or two-tailed test? Problem 50P: Assume H0:6 and H0: > 6. Is this a left-tailed, light-tailed, or two-tailed test? Problem 51P: Assume H0: p = 0.25 and Ha: p 0.25. Is this a left-tailed, right-tailed, or two-tailed test? Problem 52P: Draw the general graph of a left-tailed test. Problem 53P: Draw the graph of a two-tailed test. Problem 54P: A bottle of water Is labeled as containing 16 fluid ounces of water. You believe it Is less than... Problem 55P: Your friend claims that his mean golf score Is 63. You want to show that it Is higher than that.... Problem 56P: A bathroom scale claims to be able to dentify correctly any weight within a pound. You think that It... Problem 57P: You flip a coin and record whether it shows heads or tails. You know the probability of getting... Problem 58P: If the alternative hypothesis has a not equals ( ) symbol, you know to use which type of test? Problem 59P: Assume the null hypothesis states that the mean is at least 18. Is this a left-tailed, right-tailed,... Problem 60P: Assume the null hypothesis states that the mean is at most 12. Is this a left-tailed, right-tailed,... Problem 61P: Assume the null hypothesis states that the mean Is equal to 88. The alternative hypothesis states... Problem 62H: Some of the following statements refer to the null hypothesis, some to the alternate hypothesis.... Problem 63H: Over the past few decades, public health officials have examined the link between weight concerns... Problem 64H: A statistics instructor believes that fewer than 20% of Evergjeen Valle College (EVC) students... Problem 65H: Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the... Problem 66H: State the Type I and Type II errors in complete sentences given the following statements. a. The... Problem 67H: For statements a-j in Exercise 9.109. answer the following in complete sentences. a. State a... Problem 68H: When a new drug is created. the pharmaceutical company must subject ft to testing before receiving... Problem 69H: A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students... Problem 70H: It Is believed that Lake Tahoe Community College (LTCC) Intermediate Algebra students get less than... Problem 71H: Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the... Problem 72H: It Is believed that Lake Tahoe Community College (LTCC) Intermediate Algebra students get less than... Problem 73H: The National Institute of Mental Health published an article stating that In any one-year period,... Problem 74H: A particular brand of tires claims that its deluxe tire averages at least 50000 miles before It... Problem 75H: From generation to generation, the mean age when smokers first start to smoke varies. However, the... Problem 76H: The cost of a daily newspaper varies from city to city However, the variation among prices remains... Problem 77H: An article in the San Jose Mercury News stated that students in the California state university... Problem 78H: The mean number of sick days an employee takes per year is believed to be about ten. Members of a... Problem 79H: In 1955, Life Magazine reported that the 25 year-old mother of three worked, on average, an 80 hour... Problem 80H: Your sta1stIcs Instructor claims that 60 percent of the students who rake her Elementar Statistics... Problem 81H: A Nissan Motor Corporation advertisement read, The average mans LQ. is 107. The average brown trouts... Problem 82H: Refer to Exercise 9.19. Conduct a hypothesis test to see if your decision and conclusion would... Problem 83H: According to an article in Newsweek, the natural ratio of girls to boys is 100:105. In China, the... Problem 84H: A poll done for Newsweek found that 13% of Americans have seen or sensed the presence of an angel. A... Problem 85H: The mean work week for engineers In a start-up company is believed to be about 60 hours. A newly... Problem 86H: Use the Lap time data for Lap .1 (see Appendix C) to test the claim that Terii finishes Lap J. on... Problem 87H: Use the initial Public Offering’ data (see Appendix C) to test the claim that the mean offer price... Problem 88H: “Asian Family Reunion,” by Chau Nguyen Every two years it comes around. We all get together from... Problem 89H: ‘The Problem with Angels,” by Cyndy Dowling Although this problem is wholly mine, The catalyst came... Problem 90H: “Blowing Bubbles,” by Sondra Prull Studying stats just made me tense, I had to find some sane... Problem 91H: “Dalmatian Darnation,” by Kathy Sparling A greedy dog breeder named Spreckles Bred puppies with... Problem 92H: ‘MacaronI and Cheese, please! I” by Nedda Misberghl and Rachelle Hall As a poor starving student I... Problem 93H: “William Shakespeare: The Tragedy of Hamlet. Prince of Denmark,” by Jacqueline Ghodsi THE CHARACTERS... Problem 94H: “Untitled.” by Stephen Chen lye often wondered how software is released and sold to the public.... Problem 95H: Japanese Glrls Names’ by Kumi Furnichi It used to be vet typical for Japanese girls names to end... Problem 96H: ‘Phillip’s Wish,” by Suzanne Osorlo My nephew likes to play Chasing the girls makes his day. He... Problem 97H: “The Craven,” by Mark Salangsang Once upon a morning dreary In stats class I as weak and weary.... Problem 98H: Toastmasters Inteniational cites a repol by Gallop Poll that .10°O of Americans fear public... Problem 99H: Sixty-eight percent of online courses taught at community colleges nationwide were taught by Mi-time... Problem 100H: According to an article In Bloomberg Businessweek, New York City’s most recent adult smoking rate Is... Problem 101H: The mean age of De Anza College students in a previous term was 26.6 years old. An instructor thinks... Problem 102H: Registered nurses earned an average annual salary of $69,110. For that same year. a survey was... Problem 103H: La Leche League International reports that the mean age of weaning a child from breastfeeding is age... Problem 104H: Over the past few decades, public health officials have examined the link between weight concerns... Problem 105H: A statistics instnictor believes that fewer than 20% of EverWeen Valley College (EVC) students... Problem 106H: Previously, an organization reported that teenagers spent 3.5 hours per week, on average, on the... Problem 107H: According to the Centet for Disease Control websfte, In 2011 at least 18% of high school students... Problem 108H: A recent survey In the N.Y. limes Almanac indicated that 4.8.8% of families own stock A broker... Problem 109H: Driver error can be listed as the cause of approximately 54% of all fatal auto accidents, according... Problem 110H: The US Department of Energy reported that 51.7% of homes were heated by natural gas. A random sample... Problem 111H: For Americans using library services, the American Librar Association claims that at most 67à of... Problem 112H: The Weather Underground reported that the mean amount of summer rainfall for the northeastern US Is... Problem 113H: A survey in the N.Y. limes Almanac finds the mean commute time (one way) 15 25.4 minutes for the 15... Problem 114H: A report by the Gallup Poll found that a woman visits her doctor, on average, at most 5.8 tImes each... Problem 115H: According to the N.Y Times Almanac the mean family size In the U.S. is 3.18. A sample of a college... Problem 116H: The student academic group on a college campus claims that freshman students study at least 2.5... format_list_bulleted