OSYM-Dataset
dataMunglers
24 October 2017
OSYM Dataset -2017
The dataset used in this analysis is the university entrance examinations (YGS/LYS) data from 2017. Dataset has 11031 observations and 14 variables.
Variables
- university_name: Name of universities.
- city: the city where university is located.
- faculty_name: faculty names of universities.
- program_name: program names of faculties.
- exam_type: exam type of the university entrance examinations to be accepted into programmes.
- general_qouta: is the quota for all students.
- general_placement: is the number of placement for all students.
- min_score: minimum score of the student who attempt to this program on last order according to exam_typeof program. If a program’s placement is 0 min score is updated to 180.
- max_score: maximum score of the student who attempt to this program on first order according to exam_typeof program. . If a program’s placement is 0 min score is updated to 180.
- val_ is the same but only for valedictorians.
Initial Exploratory Analysis
- The main aim of the analysis is discover some patterns about MEF University for gaining leverage on other competitors.
1. Looking at Scores of MEF University
- Firstly; we should look at universities in Istanbul which can be strongly MEF Uni.’s competitors. So; filtered OSYM 2017 dataset as OSYM 2017-Istanbul dataset. After narrowing dataset; we wonder minimum score, maximum score, average score and IQR’s of universities in Istanbul based on exam_type to gain a perspective where MEF is on this list.
osym_summary<-osym%>%filter(grepl("STANBUL",city))%>%
group_by(city,university_name,exam_type)%>%
summarise(max_puan=round(max(max_score),2),
min_puan=round(min(min_score),2),
diff=round(max_puan-min_puan,2),
avg_max=round(mean(max_score),2),
avg_min=round(mean(min_score),2),
median_max=round(median(max_score),2),
median_min=round(median(max_score),2),
IQR1_max=round(IQR(max_score,1),2),
IQR1_min=round(IQR(min_score,1),2),
IQR3_max=round(IQR(max_score,3),2),
IQR3_min=round(IQR(min_score,3),2)
)- For looking at where MEF is located in market, we should examine Min Score of different exam types. So, You can see the Mef University’s rankings according to mean and median of min score (of different programmes) due to exam types among all universities in Turkey.
# Find te ordered list according to median of Min Score due to Exam Type
plot_median<-osym_summary %>%
select(exam_type,median_min)%>%
arrange(exam_type,desc(median_min)) %>%
ungroup %>%
group_by(exam_type) %>%
mutate(order_of_mef=row_number()) %>%
filter(grepl("MEF ",university_name))
plot_median## # A tibble: 5 x 5
## # Groups: exam_type [5]
## city university_name exam_type median_min order_of_mef
## <chr> <chr> <chr> <dbl> <int>
## 1 ISTANBUL MEF ÜNIVERSITESI DIL_1 446.08 9
## 2 ISTANBUL MEF ÜNIVERSITESI MF_1 372.36 11
## 3 ISTANBUL MEF ÜNIVERSITESI MF_4 404.68 10
## 4 ISTANBUL MEF ÜNIVERSITESI TM_1 377.29 10
## 5 ISTANBUL MEF ÜNIVERSITESI TM_3 404.92 12# Find te ordered list according to Average of Min Score due to Exam Type
plot_mean<-osym_summary %>%
select(exam_type,avg_min)%>%
arrange(exam_type,desc(avg_min)) %>%
ungroup %>%
group_by(exam_type) %>%
mutate(order_of_mef=row_number()) %>%
filter(grepl("MEF ",university_name))
plot_mean## # A tibble: 5 x 5
## # Groups: exam_type [5]
## city university_name exam_type avg_min order_of_mef
## <chr> <chr> <chr> <dbl> <int>
## 1 ISTANBUL MEF ÜNIVERSITESI DIL_1 391.42 7
## 2 ISTANBUL MEF ÜNIVERSITESI MF_1 328.73 9
## 3 ISTANBUL MEF ÜNIVERSITESI MF_4 342.15 12
## 4 ISTANBUL MEF ÜNIVERSITESI TM_1 284.48 18
## 5 ISTANBUL MEF ÜNIVERSITESI TM_3 362.69 10- Visualizing is better.
g_median <- ggplot(plot_median,aes(x=exam_type,y=order_of_mef,size=median_min))+
geom_point(stat="identity",color="purple") + scale_y_continuous(limits = c(0,20)) + ylab("Order of MEF") + xlab("Exam Type") +
ggtitle("According to Median of Min Score") +
theme_minimal()
g_mean <- ggplot(plot_mean,aes(x=exam_type,y=order_of_mef,size=avg_min))+
geom_point(stat="identity",color="darkred") + scale_y_continuous(limits = c(0,20)) + ylab("Order of MEF") + xlab("Exam Type") +
ggtitle("According to Mean of Min Score ") +
theme_minimal()
grid.arrange(g_median,g_mean,ncol=1)
- So, we can easily said that MEF University is on Top 20 List based on all exam types. According to average of min score of all programmes, Exam type:DIL-1 has MEF Uni.’s most preferable programmes. So; university should focus on these programmes if the aim is to be winner on an exam type. On the other hand; Exam type: TM-1 has the worst order, it means programmes of TM-1 are not popular options for students, ergo; MEF Uni. should focus on these programmes on advertising strategy and introducing days of university.
2. Looking At Programmes of MEF University
- Looking at programmes is important when MEF University wants to know their strongest program on market. So firstly; find the top 10 program at MEF University according to max_score.
osym_data_2017<-osym
ist.uni<-osym_data_2017 %>% filter(grepl("STANBUL",city))
mef.uni<-ist.uni %>% filter(grepl("MEF",university_name))
mef.uni.top_10 <- mef.uni %>% group_by(program_name) %>% summarise(max_max_score=max(max_score)) %>% top_n(10)
ggplot(mef.uni.top_10,aes(x=program_name,y=max_max_score)) + geom_bar(stat="identity",fill="tomato",width = 0.9) +scale_y_continuous(limits = c(0,500))+
theme_minimal() + coord_flip() +theme(axis.text = element_text(angle = 15)) + xlab("Programmes") + ylab("Max Score") + ggtitle("MEF UNIVERSITY TOP 10 PROGRAM")
According to graph; it can be observed programmes with OSYM scholarship is the most popular programmes, especially if it is full scholarship. So; MEF University can expand scholarship quota of top 10 programmes to gain more student and take advantage on undergraduate market.
Another valuable point from graph is that “Hukuk (Tam Burslu)” program of MEF University has the max score on exam. We should glance at other universities which has “Hukuk (Tam Burslu)” program to check which of them are MEF University’s competitors on this program in the undergraduate market.
ist.uni.hukuk <- ist.uni %>% filter(program_name=="Hukuk (Tam Burslu)")
orderedhukuk<-ist.uni.hukuk%>%arrange(desc(max_score))
orderedhukuk%>%select(university_name,max_score)## # A tibble: 21 x 2
## university_name max_score
## <chr> <dbl>
## 1 KOÇ ÜNIVERSITESI 558.3680
## 2 ÖZYEGIN ÜNIVERSITESI 522.6578
## 3 YEDITEPE ÜNIVERSITESI 521.7373
## 4 BAHÇESEHIR ÜNIVERSITESI 519.3311
## 5 ISTANBUL SEHIR ÜNIVERSITESI 509.7540
## 6 ISTANBUL BILGI ÜNIVERSITESI 495.1883
## 7 ISTANBUL KÜLTÜR ÜNIVERSITESI 485.4321
## 8 ISTANBUL SABAHATTIN ZAIM ÜNIVERSITESI 478.2252
## 9 IBN HALDUN ÜNIVERSITESI 474.7438
## 10 FATIH SULTAN MEHMET VAKIF ÜNIVERSITESI 462.3083
## # ... with 11 more rows#Graph is better.
set.seed(2)
ggplot(orderedhukuk,aes(x=reorder(university_name,max_score),y=max_score,label=max_score)) + geom_bar(stat="identity",fill="darkblue",width = 0.6) + coord_flip() + theme_minimal() + scale_y_continuous(limits = c(0,600)) + xlab("University") + ylab("Max Score") + ggtitle("Hukuk (Tam Burslu) Program In Universities") 
- According to graph; MEF University has strong competitors on “Hukuk (Tam Burslu)” program while it is on top 20 List of this program. Even if it seems hard to be the most preferable university briefly, MEF University should focus on “Hukuk (Tam Burslu)” program on advertising strategy and introducing days of university to ranking up and take advantage on the undergraudate market.