A study of North York University students showed the mean age of all students in the first year of university to be 20.3 years old with a standard deviation of 0.93 years. A randomly selected subgroup of these first year students also averaged 20 years in age with a standard devaition 0.91 years. a) Are the numbers 20.3 and 0.93 statistics or parameters? Explain.

• The numbers are statistics because the numbers were calculated for all North York University's first year students.
• The numbers are parameters because they were calculated for all North York University's first year students.
• The numbers are statistics because the numbers were calculated for a sample of North York University students and are therefore estimates.
• The numbers are parameters because the numbers were calculated for a sample of North York University students and are therefore estimates.

b) Are the numbers 20 and 0.91 statistics or parameters? Explain.

• The numbers are parameters because they were calculated for a sample of North York University students and are therefore estimates.
• The numbers are parameters because they were calculated for all North York University's first year students.
• The numbers are statistics because the numbers were calculated for a sample of North York University students and are therefore estimates.
• The numbers are statistics because the numbers were calculated for all North York University's first year students.

c) Select any correct pair of label and value below:

• x=20=20 and =0.93=0.93
• x=20.3=20.3 and =0.93=0.93
• =20=20 and =0.93=0.93
• =20=20 and s=0.91=0.91
• x=20.3=20.3 and s=0.93=0.93
• =20.3=20.3 and s=0.91=0.91
• x=20=20 and s=0.93=0.93
• =20.3=20.3 and =0.91