Question 1 of 20 5.0 Points A botany student counted 11 blades of grass in one square centimeter of

Question 1 of 20
5.0 Points
A botanystudent counted 11 blades of grass in one square centimeter oflawn and measured the lawn as a rectangle 61 m by 31 m. She reportedthat there were 208,010,000 blades of grass in the lawn. The precisionof her conclusion:
A.correctly represents her measurements.
B. isless than her measurements warrant.
C.could be greater if she used a more precise calculator.
D. isexcessive given her measurements.
Question 4 of 20
5.0 Points
A homeowner put a brand-namefertilizer/weed killer on half of his lawn and a generic fertilizer/weed killeron the other half. After three weeks, the generic side had 1 weed per squaremeter, the other side 1.7 weeds per square meter. The generic side required twomowings in the 3 weeks, the brand-name side one. The homeowner concluded thatthe generic was superior to the brand-name. Determine which evaluationguideline applies best in questioning the results of the described study.
A.Consider possible confounding variables.
B.Consider the sample.
C.Consider the type of study.
D.Consider the source.
Question 5 of 20
5.0 Points
Whichdata provide the answer to the question: “How frequently can a student atEureka College be expected to study more than three hours a day?â€
A. Of100 students surveyed, 43 reported that they study at least three hours a daytwice a week.
B. Of100 students surveyed, 43 reported that they have studied at least threehours a day.
C. Of100 students surveyed, 43 reported that they studied at least three hours aday twice last week.
D. Of100 students surveyed, 43 reported that they intend to study at least threehours a day next week.
Question 6 of 20
5.0 Points
A studentwanted to know the favorite lunch at a large high school with a closed campus.What is the first step in conducting a statistical study to answer thequestion?
A.Select a random sample of students.
B.State the goal of the study precisely.
C.Select a random sample of students and teachers.
D.Select a random sample of teachers.
Question 7 of 20
5.0 Points
Temperaturesin degrees Fahrenheit of the ocean at various depths:
A.Ratio
B.Interval
C.Ordinal
D.Nominal
Question 9 of 20
5.0 Points
Convert5.65 to a percent.
A. 565%
B.5.65%
C.0.565%
D.56.5%
Question 12 of 20
5.0 Points
Two statements are given below.Select the statement for which a ratio of the measurements is meaningful. State“Neither†or “Both†if appropriate.1 – Kasheta ran the race in 22.3sec, and Louisa ran the same race in 26.4 sec.2 – Juan gets out of school at2:45 PM, and Aito gets out of school at 3:15 PM.
A.Kasheta ran the race in 22.3 sec, and Louisa ran the same race in 26.4 sec.
B.Neither
C. Both
D. Juangets out of school at 2:45 PM, and Aito gets out of school at 3:15 PM.
Question 13 of 20
5.0 Points
Supposethat the cost of a statistics text was $50 in 1985 and is $100 in 2000. What isthe ‘Statistics Text Index’ number, rounded to the nearest tenth, for the 2000edition with the 1985 price as the reference value?
A. 20.0
B.200.0
C. 50.0
D. 2.0
Question 15 of 20
5.0 Points
Convert13% to decimal form.
A. 0.013
B. 0.13
C. 1.3
D. 13
Question 17 of 20
5.0 Points
In asurvey of 80 high school football players who committed to play in the DivisionIII CCIW conference, 64 said that they would work out in their high schoolweight rooms in the summer before college. The margin of error for the surveywas 6%. A census of all CCIW football players (not just freshmen) showed that59% worked out at their high schools. One can conclude that:
A. thesubjects were less than forthcoming in their responses to the survey.
B. thesample was not representative of the population.
C.there must have been an error in the determination of the margin of error.
D. thecensus results are consistent with the confidence interval of the study.
Question 18 of 20
5.0 Points
A poll of700 persons attending the Taste of Chicago showed that 455 persons, 65% of thesample, believed that the food was overpriced. It is estimated that 1,250,000persons attend the Taste. Statistics suggest that, although 65% plus or minus5% of attendees believe that the food is overpriced, the Taste is a popularevent. The raw data of the study is (are)
A. 65%of the sample.
B. 700persons, 455 persons.
C.1,250,000 persons, 700 persons, 455 persons.
D.(60%, 70%).
Question 19 of 20
5.0 Points
A U.S.government report stated that, “With bank interest rates around1.0%, 8% of wage earners believe it worthwhile to keep money in asavings account. However, at 3.0% interest, 36% of wage earners believeit worthwhile to keep money in a savings account. The margin of errorfor both studies is 4 percentage points.â€. A proper conclusion from thestudies is that:
A.increasing the interest rate from 1% to 3% will increase the number ofpersons saving money in a savings account.
B.increasing the interest rate may well have no effect on the number ofpersons saving money in a savings account.
C.increasing the interest rate will increase the number of persons savingmoney in a savings account.
D. theinterest rate difference between 1% and 3% may well have no effecton the number of persons saving money in a savings account.
Question 20 of 20
5.0 Points
Comparedwith a stopwatch that gives readings as –. – seconds, a stopwatch that givesreadings as –. – – seconds is:
A. moreaccurate, but not necessarily more precise.
B. moreprecise and more accurate.
C. notnecessarily more precise or more accurate.
D. moreprecise, but not necessarily more accurate.