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Table 7 The descriptive statistics and chi-square test of the practical survey results of the questionnaires were computed by SPSS

From: Employing systems of green walls to improve performance and rationalize energy in buildings

No. of question

Question about

Minimum

Maximum

Mean

Std. deviation

Chi-square

df

Asymp. Sig.

Statistic

Statistic

Statistic

Std. error

Statistic

1

Aim

3

5

4.87

0.049

0.383

134.942a

2

0.000

2

Stages

3

5

4.76

0.059

0.468

94.861a

2

0.000

3

Evaluation

3

5

4.16

0.052

0.413

66.813a

2

0.000

4

Support

4

5

4.77

0.054

0.422

96.129a

2

0.000

5

Integration

4

5

4.94

0.031

0.248

155.806a

2

0.000

6

Green value

4

5

4.82

0.049

0.385

111.661a

2

0.000

7

Conceptual

4

5

4.68

0.060

0.471

71.161a

2

0.000

8

Mechanism

4

5

4.73

0.057

0.450

82.629a

2

0.000

9

Design

4

5

4.76

0.055

0.432

91.403a

2

0.000

  1. Minimum and maximum, the chosen value of the answer is composed of 5 points used by the Likert scale about questions; Mean—Statistic, this indicates that the answers are closer to which point than 5 points on the Likert scale; Mean—Std. error, the maximum allowed error in estimating the mean is less than or equal to the standard error of the exploratory sample calculated by the researcher, which is one degree of importance equal to 0.1105; Std. deviation, the questions that have a lower value. The difference in views about the question is less; this indicates convergence and agreement in the responses; Chi-square, this value summarizes the difference between our data (observed) and our independence hypothesis (expected). There is a considerable degree of agreement among the respondents about one answer; a, 0 cells (.0%) have expected frequencies less than 5. The minimum expected cell frequency is 15.5; df, the degree of freedom is a number that determines the exact shape of the distribution. It is calculated by the number of rows and columns in the table frequencies of the questionnaire; Asymp. Sig., the p-value is less than 0.05 indicating that there is a significant statistical difference that confirmed the convergence and agreement in the answers. There is a correlation between the participations’ answers