Descriptive Sta...

How many fewer books were checked out on Saturday than Tuesday?

How much less money did Thomas earn than Bala?

According to the graph above, in which year was the ratio of the number of students enrolled at School $$B$$ to the number of students enrolled at School $$A$$ the greatest?

Which year did the same number of boys and girls attend the conference?

The mean of a finite set X of numbers is $$14$$, the median of this set of numbers is $$12$$, and the standard deviation is $$1.8$$. A new set Y is formed by multiplying each member of the set S by $$3$$. Determine the correct statements w.r.t. set Y:
I. The mean of the numbers is set Y is $$42$$
II. The median of the numbers in set Y is $$36$$
III. The standard deviation of the numbers is set Y is $$5.4$$

How many watches were sold in all 5 months?

Grades for the test on proofs did not go as well as the teacher had hoped. The mean grade was 68, the median grade was 64, and the standard deviation was 12. The teacher curves the score by raising each score by a total of 7 points. Which of the following statements is true?
I. The new mean is 75.
II. The new median is 71.
III. The new standard deviation is 7.

The figure above shows the cost of joining and buying music from a music subscription service. What does the y-intercept of the line most likely represent?

A random variable $$X$$ has the probability distribution given below. Its variance is