In a week the prices of a bag of rice were 350,280, 340, 290, 320, 310, 300. The range is________?

You asked five of your classmates about their height. On the basis of this information, you stated that the average height of all students in your university or college is 67 inches. This is an example of?

γxy is always equal to________?

Frequency table is an arrangement of data by classes together with their ________ class frequencies?

The probability of getting exactly three tails when three balanced coins are tossed once ________?

Class interval size is the different between the upper and lower class________ of a class?