Descriptive statistics
The observations X,...,Xn have a mean of 52, a median 52.1, and a standard deviation of 7. Eight percent of the observation are greater than 66%; 7.9% of the observations are below 38. Based on this information, which of the following statements best describes the data ?
In a week the prices of a bag of rice were 350, 280, 340, 290, 320, 310, 300. The range is?
The mean of 10 observations is 10. All observations are increased by 10%. The mean of the increased observations shall be?
If the mean (x) is 4 and the data points are 2, 3, 4, 5, and 6, what will be the sum of the squared deviations from the mean (x)?
If a distribution is skewed to the left, then it is?