PROBABILITY STATISTICS AND DATA
COMPREHENSIVE TEST PAPER QUESTIONS
AND SOLUTIONS GRADED APLUS
●● If a distribution is skew right, which is larger: mean or median?
Answer: The mean.
●● What is the probability of rolling a 4 on a six sided die?
Answer: 1/6.
●● What does σ represent?
Answer: Population standard deviation.
●● What is the midpoint of 30-38?
Answer: 34.
●● What does a positive z-score mean?
Answer: The value is above the mean.
●● What level of measurement is favorite restaurant?
Answer: Nominal.
, ●● What does a larger standard deviation mean?
Answer: Data is more spread out.
●● What does correlation not imply?
Answer: Causation.
●● What is the formula for z-score?
Answer: z = (X - M) / s.
●● What is a convenience sample?
Answer: A sample chosen from easily available individuals.
●● What is the median?
Answer: The middle value in an ordered data set.
●● What is the empirical rule?
Answer: 68% within 1 SD, 95% within 2 SD, and 99.7% within 3 SD.
●● What does Σ (sigma) mean?
Answer: Sum of; add all values together.
COMPREHENSIVE TEST PAPER QUESTIONS
AND SOLUTIONS GRADED APLUS
●● If a distribution is skew right, which is larger: mean or median?
Answer: The mean.
●● What is the probability of rolling a 4 on a six sided die?
Answer: 1/6.
●● What does σ represent?
Answer: Population standard deviation.
●● What is the midpoint of 30-38?
Answer: 34.
●● What does a positive z-score mean?
Answer: The value is above the mean.
●● What level of measurement is favorite restaurant?
Answer: Nominal.
, ●● What does a larger standard deviation mean?
Answer: Data is more spread out.
●● What does correlation not imply?
Answer: Causation.
●● What is the formula for z-score?
Answer: z = (X - M) / s.
●● What is a convenience sample?
Answer: A sample chosen from easily available individuals.
●● What is the median?
Answer: The middle value in an ordered data set.
●● What is the empirical rule?
Answer: 68% within 1 SD, 95% within 2 SD, and 99.7% within 3 SD.
●● What does Σ (sigma) mean?
Answer: Sum of; add all values together.
