d. 1 Sometimes we need to use median instead of mean to better measure central t

Question

d. 1 Sometimes we need to use median instead of mean to better measure central tendency in a sample if 6. a. The sample has a large variance b. We have measurement error when collecting the sample c. The sample mean is too small d. The distribution is extrenely skewed. 7. In a bell-shaped distribution, changing_ can make the shape of distribution flatter, or skinner; and changingcan shift the central location of distribution to the left or to the right. a. Mean, variance b. Range, standard deviation c. Mode, range d. Mean, range e. Mode, variance f. Variance, mean 8. If a distribution is left-skewed, its mean is usually _its median a. smaller than b. bigger than c. equal to d. we can not know 9. A researcher collected BMI (Body Mass Index) of 50 students in an Engineering school. He found the mean BMI was much smaller than the median BMI. The reason for this might be a. Several students had much larger BMI scores than the rest b. Several students had much smaller BMI scores than the other students c. The researcher made some measurement errors d. All the students had smaller BMI scores, compared to national average

Explanation / Answer

6. Correct Answer: Option (D)
7. Correct Answer: Option (f)
8. Correct Answer: Option (a)
9. Correct Answer: Option (a)

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