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Transcribed Image Text:Question 8
Thirty students in a chemistry class each completed a particular lab assignment. Gerald and Sharon each collected data from the students to estimate
the mean time it took for the class to complete the assignment. Gerald asked 4 of the students how long each one of them took to complete the
assignment, and correctly calculated a mean time of 38 minutes. Sharon asked 10 different students in the class the same question, and correctly
calculated a mean time of 32 minutes.
Both Gerald and Sharon claim their calculated mean time for completing the assignment is the better estimate of the actual mean time for the whole
class. Which of the following statements best explains who is correct?
A. Gerald’s calculated mean time is most likely the better estimate because his sample has less variability due to a smaller sample size.
B. Gerald’s calculated mean time is most likely the better estimate because his sample is more precise due to a smaller sample size.
C. Sharon’s calculated mean time is most likely the better estimate because her sample has less bias due to a larger sample size.
D. Sharon’s calculated mean time is most likely the better estimate because her sample is more accurate due to a larger sample size.
Thirty students in a chemistry class each completed a particular lab assignment. Gerald and Sharon each collected data from the students to estimate
the mean time it took for the class to complete the assignment. Gerald asked 4 of the students how long each one of them took to complete the
assignment, and correctly calculated a mean time of 38 minutes. Sharon asked 10 different students in the class the same question, and correctly
calculated a mean time of 32 minutes.
Both Gerald and Sharon claim their calculated mean time for completing the assignment is the better estimate of the actual mean time for the whole
class. Which of the following statements best explains who is correct?
A. Gerald’s calculated mean time is most likely the better estimate because his sample has less variability due to a smaller sample size.
B. Gerald’s calculated mean time is most likely the better estimate because his sample is more precise due to a smaller sample size.
C. Sharon’s calculated mean time is most likely the better estimate because her sample has less bias due to a larger sample size.
D. Sharon’s calculated mean time is most likely the better estimate because her sample is more accurate due to a larger sample size.
