Mathematical and Statistical Models with Applications of Spread of Private Tutoring in Saudi Arabia

Table 1

Notes to be considered about the data tables.

X	Factor	Signal	Description
	Lake of achievement	+	Yes
		−	No
	Frequent absence from school or university	+	Yes
		−	No
	Obtain a high mark	+	Yes
		−	No
	Explain the behavior of the student during the lesson	+	Yes
		−	No
	The culture of the tradition of classmates	+	Yes
		−	No
	Lack of self-reliance	+	YES
		−	NO
	Inadequate knowledge of the educational material	+	YES
		−	NO
	A poor economic situation	+	YES
		−	NO
	Unsuitable work environments	+	YES
		−	NO
	Financial situation	+	YES
		−	NO
	Lack of parental supervision of the children	+	YES
		−	NO
	Lack of incentives for teachers	+	YES
		−	NO
	Lack of supervision and follow-up of teachers or university professors	+	YES
		−	NO
	The lack of counseling for teachers regarding enrolling in training courses on modern teaching methods	+	YES
		−	NO
	Large number of students in classroom	+	YES
		−	NO
	Students are not aware of the good use and communication of tutoring	+	YES
		−	NO
	Y (response)	Grades	First term exams math in 2018 in