The time required to finish a test in normally distributed with a mean of 40 minutes and a standard deviation of 8 minutes. what is the probability that a student chosen at random will finish the test in less than 48 minutes? 84% 2% 34% 16%

84%.

Step-by-step explanation:

Let X be the time in minutes for a student chosen at random to finish the test.  .

The probability that a student chosen at random finishes the test in less than 48 minutes will represented as

.

Evaluate the cumulative normal probability on a calculator, where

.

.

.

Look up the entry that corresponds to on a z-score table: 0.8413.

In other words,

.

connie < felicia < stew

step-by-step explanation:

stew:

we need to find the slope

m = (y2-y1)/ (x2-x1)

    = (2650-795)/(10-3)

    = 1855/7

265 words per minute

connie:

we need to find the slope

m = (y2-y1)/ (x2-x1)

we have two points (0,0) and (4,800)

m = (800-0)/(4-0)

  m = 800/4

    200 words per minute

felicia:

260 words per minute

200< 260 < 265

connie < felicia < stew

the car was traveling 40 mph before it started skidding. ( 2 points ) 17. was the driver were her brakes working at 75% efficiency or better? ( 2 points ) yes 29.

step-by-step explanation: