The probability of an outcome that lies within 68% of the mean is a good indicator that it lies in which standard deviation?
A) There is a probability that the outcome is within 3 standard deviations of the mean.
B) There is a probability that the outcome is within 2 standard deviations of the mean.
C) There is a probability that the outcome is within 1 standard deviation of the mean.
D) Standard deviations are not reliable, so the probability cannot be determined.

C) There is a probability that the outcome is within 1 standard deviation of the mean.

Step-by-step explanation:

The Standard Deviation Rule states that for a normal distribution, nearly all of the data will fall within three standard deviations of the mean. According to the rule,

68% of data falls within the first standard deviation from the mean.

95% fall within two standard deviations.

99.7% fall within three standard deviations

Therefore, the correct answer is

C) There is a probability that the outcome is within 1 standard deviation of the mean.

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)