Statistics question True or False The length of the whiskers

True or False: The length of the whiskers in a boxplot are always equal to 1 5 Times IQR, where IQR is the interquartile range. True or False: The mean is an example of a robust statistic which is why we compute it most often. True or False: A distribution that is skewed to the left has a mean greater than the median. True or False: The mean of a sample can be determined from a boxplot. True or False: The Shapiro-Wilk\'s test can be used to text whether a sample comes from a normal distribution. Concentrations of calcium and citric acid in 72 blood specimens were measured in mg/dL Which of the following is correct? Both Calcium and Citric acid concentration are numerical variables. We should use a side-by-side boxplot to display the data. The variables are both discrete random variables.

Solution

Ans 1) True

Ans 2) False. Mean is not a robust statistics

Ans 3) False

Ans 4) False. Median and quartiles can be determined

Ans 5) True

Ans 6) Option d is correct