The distribution of the heights of students in a large class is roughly bell-shaped. Moreover, the average height is 68 inches, and approximately 95% of the heights are between 62 and 74 inches. Thus, the standard deviation of the height distribution is approximately equal to: a. 2
b. 3
c. 6
d. 9
e.12

a. 2

Step-by-step explanation:

According to the Empirical rule, when data is normally distributed then 95% of the lies within 2 standard deviations from mean.

Given: The distribution of the heights of students in a large class is roughly bell-shaped ( i.e. Normally distributed).

The average height is 68 inches, and approximately 95% of the heights are between 62 and 74 inches.

Then, by  Empirical rule, 68 -2(standard deviations) =62  [lower limit]

⇒ 2(standard deviations)= 68-62 = 4

⇒ standard deviations=2

Hence, correct option is a. 2

c is the correct answer

step-by-step explanation:

think about the doctor who treated the major and the speaker in the short story "in another country." put yourself in the shoes of the doctor, and based on what you read in the story, write what you think his thoughts about the major and the speaker would be. use the following vocabulary in your response and change the form of these words as needed: detached resign withered