Imagine a college where say 2000 students are taking an intro stat course. Imagine from historical data, that student scores of a final exam can be viewed as approximately normal with a mean of 70 and a sd of 10. Suppose an A grade is considered to be 90 or higher. Now imagine a SRS of 100 students is selected from the group of 2000 students, where we then compute the sample mean of these 100 students.

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)  

98%

step-by-step explanation:

70 years.

step-by-step explanation: