The Mentor of a Class Researched the Number of Hours

question 71

Essay

The mentor of a class researched the number of hours spent on study in a week by each student of the class in order to analyze the correlation between the study hours and the marks obtained by each student. The data on the hours spent per week by 25 students are listed below. $$\begin{array} { l l l l l } 13 & 14 & 16 & 15 & 12 \\12 & 19 & 21 & 22 & 19 \\13 & 16 & 18 & 25 & 21 \\17 & 18 & 23 & 16 & 12 \\24 & 20 & 14 & 22 & 15\end{array}$$
a. What is the least amount of time a student spent per week on studying in this sample? The highest?
b. Use a class width of 2 hours to prepare a frequency distribution, a relative frequency distribution, and a percent frequency distribution for the data.
c. Prepare a histogram and comment on the shape of the distribution.

---

Definitions:

Rhythmical Responses

Repetitive and patterned reactions, often in the context of music therapy or psychological assessments, indicating cognitive and emotional states.

Hertz

A unit of frequency in the International System of Units (SI), equal to one cycle per second.

Episodic Insomnia

A form of insomnia that occurs periodically, characterized by difficulty falling or staying asleep, and is often tied to specific stressors or events.

Primary Insomnia

A sleep disorder characterized by persistent difficulty falling asleep or staying asleep that is not caused by other health issues or substances.