STA 2014 Week 2 Individual Work Solution Correct Answers
Week 2 individual work answers for a statistics course.
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STA 2014 Week 2 Individual Work Solution Correct Answers
1.1 Skill Building
22. Number of Siblings
24. Number on a football player’s jersey
32. Number of sequoia trees in a randomly selected acre of Yosemite National Park
34. Internet connection speed in Kilobytes per second
52. BMW cars the following information relates to the 2008 model year product line of
automobiles.
58. Financial Worries? Gallup News Service conducted a survey of 1,006 American adult aged
18 years or older. September 24-27, 2007. The respondents were asked, “What, if anything,
worries you most about your personal financial situation in the long term?” Of the 1,006 adults
surveyed, 18% said they were most worried about having enough money for retirement.
(Ironically, not having enough money for retirement was not a short-term concern.) Gallup
reported that 18% of all adult Americans were most worried about not having enough money for
retirement, with a 4% margin of error with 95% confidence.
(a) What is the research objective?
(b) What is the population?
(c) What is the sample?
1.1 Skill Building
22. Number of Siblings
24. Number on a football player’s jersey
32. Number of sequoia trees in a randomly selected acre of Yosemite National Park
34. Internet connection speed in Kilobytes per second
52. BMW cars the following information relates to the 2008 model year product line of
automobiles.
58. Financial Worries? Gallup News Service conducted a survey of 1,006 American adult aged
18 years or older. September 24-27, 2007. The respondents were asked, “What, if anything,
worries you most about your personal financial situation in the long term?” Of the 1,006 adults
surveyed, 18% said they were most worried about having enough money for retirement.
(Ironically, not having enough money for retirement was not a short-term concern.) Gallup
reported that 18% of all adult Americans were most worried about not having enough money for
retirement, with a 4% margin of error with 95% confidence.
(a) What is the research objective?
(b) What is the population?
(c) What is the sample?
(d) List the descriptive statistics.
(e) What can be inferred from the survey?
1.2 Skill Building
14. While shopping, 200 people were asked to perform a taste test in which they drink from two
randomly placed, unmarked cups. They are then asked which drink they prefer.
16. Conservation agents netted 250 large-mouth bass in a lake and determined how many were
carrying parasites.
1.5 Skill Building
14. The village of Oak Lawn wishes to conduct a study regarding the income level of households
within the village. The village manager selects 10 homes in southwest corner of the village and
sends an interviewer to the homes to determine household income.
16. Suppose you are conducting a survey regarding the sleeping habits of students. From a list
of registered students, you obtain a simple random sample of 150 students. One survey question
is “How much sleep do you get?
18. Cold Stone Creamery is considering opening a new store in O’Fallon. Before opening the
store, the company would like to know the percentage of households in O ’Fallen that regularly
visit an ice cream shop. The market researcher obtains a list of households in O ‘Fallon and
randomly selects 150 of them. He mails a questionnaire to the 150 households that ask about
ice cream eating habits and flavor preferences. Of the 150 questions mailed 4 are returned.
(e) What can be inferred from the survey?
1.2 Skill Building
14. While shopping, 200 people were asked to perform a taste test in which they drink from two
randomly placed, unmarked cups. They are then asked which drink they prefer.
16. Conservation agents netted 250 large-mouth bass in a lake and determined how many were
carrying parasites.
1.5 Skill Building
14. The village of Oak Lawn wishes to conduct a study regarding the income level of households
within the village. The village manager selects 10 homes in southwest corner of the village and
sends an interviewer to the homes to determine household income.
16. Suppose you are conducting a survey regarding the sleeping habits of students. From a list
of registered students, you obtain a simple random sample of 150 students. One survey question
is “How much sleep do you get?
18. Cold Stone Creamery is considering opening a new store in O’Fallon. Before opening the
store, the company would like to know the percentage of households in O ’Fallen that regularly
visit an ice cream shop. The market researcher obtains a list of households in O ‘Fallon and
randomly selects 150 of them. He mails a questionnaire to the 150 households that ask about
ice cream eating habits and flavor preferences. Of the 150 questions mailed 4 are returned.
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Document Details
University
University of Central Florida
Subject
Statistics