Math 116 - Chapter 1 Name___________________________________Indicate the sampling technique used.1)At a college there are 120 freshmen, 90 sophomores, 110 juniors, and 80 seniors. A schooladministrator selects a simple random sample of 12 of the freshmen, a simple random sample of9 of the sophomores, a simple random sample of 11 of the juniors, and a simple random sampleof 8 of the seniors. She then interviews all the students selected. Identify the type of samplingused in this example.A)Stratified samplingB)Cluster samplingC)Simple random samplingD)Systematic random sampling1)Determine whether the given value is a statistic or a parameter.2)A sample of 120 employees of a company is selected, and the average age is found to be 37 years.A)StatisticB)Parameter2)Identify the number as either continuous or discrete.3)The height of 2-year-old maple tree is 28.3 ft.A)ContinuousB)Discrete3)Indicate the sampling technique used.4)From a group of 496 students, every 49th student starting with the 3rd student is selected.Identify the type of sampling used in this example.A)Simple random samplingB)Cluster samplingC)Systematic random samplingD)Stratified sampling4)Identify the number as either continuous or discrete.5)The total number of phone calls a sales representative makes in a month is 425.A)DiscreteB)Continuous5)Provide an appropriate response.6)True or false? In simple random sampling, each possible sample is equally likely to be the oneobtained.6)Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.7)Amount of fat (in grams) in cookies.A)RatioB)NominalC)IntervalD)Ordinal7)Classify the study as either descriptive or inferential.8)A meteorologist constructs a graph showing the total precipitation in Phoenix, Arizona in eachof the months of 1998. Does this involve descriptive statistics or inferential statistics?A)Inferential statisticsB)Descriptive statistics8)1Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.9)Student's grades, A, B, or C, on a test.A)IntervalB)OrdinalC)RatioD)Nominal9)Indicate the sampling technique used.10)An education researcher randomly selects 38 schools from one school district and interviewsall the teachers at each of the 38 schools. Identify the type of sampling used in this example.A)Simple random samplingB)Stratified samplingC)Cluster samplingD)Systematic random sampling10)Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.11)The subjects in which college students major.A)RatioB)OrdinalC)NominalD)Interval11)Indicate the sampling technique used.12)A pollster uses a computer to generate 500 random numbers and then interviews the voterscorresponding to those numbers. Identify the type of sampling used in this example.A)Simple random samplingB)Systematic random samplingC)Stratified samplingD)Cluster sampling12)Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.13)Temperatures of the ocean at various depths.A)OrdinalB)NominalC)IntervalD)Ratio13)Identify the study as an observational study or a designed experiment.14)A researcher wished to assess the importance of exercise in weight-loss programs. 412 people,all considered to be at least 20 pounds overweight, volunteered to participate in a study. Theparticipants were randomly assigned to one of two groups. Over a two-month period, the firstgroup followed a particular diet but were instructed to perform no exercise other than walking.The second group followed the same diet but also performed aerobic exercise for one hour eachday. At the end of the two months, the weight loss of each participant was recorded. Theaverage weight loss was calculated for each group and it was found that the average weightloss for the second group was significantly greater than the average weight loss for the firstgroup.A)Designed experimentB)Observational study14)Determine whether the given value is a statistic or a parameter.15)After inspecting all of 55,000 kg of meat stored at the Wurst Sausage Company, it was foundthat 45,000 kg of the meat was spoiled.A)StatisticB)Parameter15)2Identify the study as an observational study or a designed experiment.16)An educational researcher used school records to determine that, in one school district, 84% ofchildren living in two-parent homes graduated high school while 75% of children living insingle-parent homes graduated high school.A)Observational studyB)Designed experiment16)17)In a clinical trial, 780 participants suffering from high blood pressure were randomly assignedto one of three groups. Over a one-month period, the first group received the experimentaldrug, the second group received a placebo, and the third group received no treatment. Thediastolic blood pressure of each participant was measured at the beginning and at the end ofthe period and the change in blood pressure was recorded. The average change in bloodpressure was calculated for each of the three groups and the three averages were compared.A)Observational studyB)Designed experiment17)Use the calculator to generate random numbers.18)A market researcher is conducting a telephone poll. She has a list of 581 registeredvoters and wishes to interview a random sample of 12 of them. Use your calculator toconstruct a list of 12 random numbers between 1 and 581 that can be used in obtainingthe required simple random sample. Indicate the numbers obtained.SEE INSTRUCTIONS IN Notes for Chapters 1-3.18)Classify the study as either descriptive or inferential.19)The table below shows the number of homicides in the U.S. in each of the years 1989-1993.Year Murder and non-negligentmanslaughterNumber of offenses1989 21,5001990 23,4401991 24,7001992 23,7601993 24,530A)DescriptiveB)Inferential19)20)Based on a random sample of 1000 people, a researcher obtained the following estimates of thepercentage of people lacking health insurance in one U.S. city.Age Percentage not covered18-24 28.225-39 24.940-54 19.155-65 16.5A)InferentialB)Descriptive20)3Determine whether the evaluated group is a population or a sample.21)A researcher examines the records of all the registered voters in one city and finds that 43% areregistered Democrats.A)PopulationB)Sample21)22)The average age of 45 employees of a large company is found to be 32 years.A)SampleB)Population22)4Answer KeyTestname: