Set the working directory:

  1. Download “StudentSurvey.csv” to your computer.
  2. Set Working directory to the folder you saved your file in.
  3. read the file using read.csv command.
#If your assignment does not render, you might need to install.packages("htmltools")
#install.packages("htmltools")

Instructions:

Read the StudentSurvey into this markdown and answers the following questions

#read the StudentSurvey.csv in here
StudentSurvey <- read.csv("StudentSurvey.csv")

Check the data structure:

#check the head of the data set
head(StudentSurvey$Year)
## [1] "Senior"    "Sophomore" "FirstYear" "Junior"    "Sophomore" "Sophomore"
#check the dimensions
dim(StudentSurvey)
## [1] 79 17
#create a table of students'sex and "HigherSAT"
sexAndHigherSAT <- table(StudentSurvey$Sex,StudentSurvey$HigherSAT)
sexAndHigherSAT
##    
##     Math Verbal
##   F   25     15
##   M   24     15
# Display summary statistics for VerbalSAT
print(StudentSurvey$VerbalSAT)
##  [1] 540 520 550 490 720 600 640 660 670 500 650 590 600 700 610 550 550 560 560
## [20] 550 550 700 610 570 550 500 610 610 500 640 490 560 560 470 680 570 630 580
## [39] 550 490 590 620 560 630 600 550 640 650 420 500 620 600 580 490 630 600 590
## [58] 550 600 600 600 650 650 560 540 680 500 570 540 550 680 630 650 680 550 600
## [77] 540 550 500
#Find the average GPA of students
totalSummedGPA <- sum(StudentSurvey$GPA)
totalStudents <- length(StudentSurvey$GPA)
avgStudentGPA <- (totalSummedGPA/totalStudents)
print(avgStudentGPA)
## [1] 3.169114
#Create a new dataframe, call it "column_df". This new dataframe should contain students' weight and number of hours the exercise 

column_df <- data.frame('weight' = StudentSurvey$Weight, 'numOfHoursOfExercise' = StudentSurvey$Exercise)
column_df
##    weight numOfHoursOfExercise
## 1     180                   10
## 2     120                    4
## 3     208                   14
## 4     110                    3
## 5     150                    3
## 6     114                    5
## 7     128                   10
## 8     235                   13
## 9     115                   12
## 10    140                   12
## 11    135                    6
## 12    110                   10
## 13     99                    3
## 14    165                    7
## 15    120                    2
## 16    154                   14
## 17    110                   10
## 18    145                   14
## 19    195                   20
## 20    200                    7
## 21    167                   12
## 22    175                   10
## 23    155                    6
## 24    185                   14
## 25    190                   12
## 26    165                   10
## 27    175                    8
## 28    126                    0
## 29    187                   10
## 30    170                    6
## 31    158                    5
## 32    119                   24
## 33    205                    2
## 34    129                   10
## 35    145                    6
## 36    130                    5
## 37    215                    5
## 38    135                   12
## 39    145                    2
## 40     98                    7
## 41    150                   15
## 42    159                    5
## 43    174                    7
## 44    160                   15
## 45    165                    8
## 46    161                   14
## 47    130                    4
## 48    175                   15
## 49    255                    4
## 50    160                   15
## 51    160                    3
## 52     95                    3
## 53    115                   15
## 54    120                   20
## 55    135                    3
## 56    180                    6
## 57    155                   12
## 58    110                    4
## 59    215                   20
## 60    140                   10
## 61    195                   10
## 62    185                    4
## 63    185                    9
## 64    209                   12
## 65    145                    2
## 66    180                    2
## 67    170                    5
## 68    135                    5
## 69    165                    6
## 70    137                   10
## 71    147                    4
## 72    150                    5
## 73    155                   17
## 74    160                    7
## 75    130                    2
## 76    180                    8
## 77    150                    1
## 78    205                   14
## 79    115                   12
#Access the fourth element in the first column from the StudentSurvey's dataset.

StudentSurvey
##         Year Sex Smoke   Award HigherSAT Exercise TV Height Weight Siblings
## 1     Senior   M    No Olympic      Math       10  1     71    180        4
## 2  Sophomore   F   Yes Academy      Math        4  7     66    120        2
## 3  FirstYear   M    No   Nobel      Math       14  5     72    208        2
## 4     Junior   M    No   Nobel      Math        3  1     63    110        1
## 5  Sophomore   F    No   Nobel    Verbal        3  3     65    150        1
## 6  Sophomore   F    No   Nobel    Verbal        5  4     65    114        2
## 7  FirstYear   F    No Olympic      Math       10 10     66    128        1
## 8  Sophomore   M    No Olympic      Math       13  8     74    235        1
## 9  FirstYear   F    No   Nobel      Math       12  1     60    115        7
## 10 Sophomore   F    No Olympic      Math       12  6     65    140        1
## 11    Junior   F    No   Nobel    Verbal        6  1     68    135        2
## 12 FirstYear   F    No Olympic      Math       10  2     63    110        1
## 13 FirstYear   F    No Olympic    Verbal        3 15     63     99        2
## 14 Sophomore   M    No   Nobel    Verbal        7  3     72    165        2
## 15 Sophomore   F    No   Nobel      Math        2  1     62    120        1
## 16 Sophomore   F    No Olympic    Verbal       14  2     67    154        1
## 17 Sophomore   F    No   Nobel      Math       10  5     65    110        1
## 18 Sophomore   F    No   Nobel      Math       14  2     68    145        8
## 19 FirstYear   M    No Olympic      Math       20 20     73    195        3
## 20 Sophomore   M    No Olympic      Math        7 10     74    200        1
## 21 Sophomore   M    No Olympic      Math       12  3     70    167        1
## 22 Sophomore   M    No   Nobel      Math       10  5     71    175        3
## 23 Sophomore   F    No Academy    Verbal        6  8     67    155        1
## 24    Junior   M    No   Nobel      Math       14  2     74    185        1
## 25 FirstYear   M    No Olympic      Math       12  6     68    190        1
## 26    Senior   M    No Olympic    Verbal       10  4     72    165        1
## 27    Junior   M    No Academy      Math        8  8     62    175        2
## 28 Sophomore   F    No   Nobel      Math        0  2     66    126        5
## 29 FirstYear   M    No Olympic      Math       10 20     70    187        3
## 30    Senior   M    No   Nobel    Verbal        6 10     72    170        2
## 31 FirstYear   F    No Olympic      Math        5  2     67    158        4
## 32 Sophomore   F    No Olympic      Math       24  5     62    119        1
## 33 FirstYear   M    No Olympic      Math        2  5     73    205        1
## 34 Sophomore   F    No Academy      Math       10  5     67    129        1
## 35 Sophomore   F    No Academy    Verbal        6  5     67    145        0
## 36    Junior   F    No   Nobel    Verbal        5  5     64    130        0
## 37    Senior   M    No   Nobel    Verbal        5  5     72    215        3
## 38 Sophomore   F    No   Nobel    Verbal       12  4     64    135        2
## 39 Sophomore   F    No Olympic    Verbal        2  5     70    145        0
## 40 FirstYear   F    No Olympic      Math        7  8     60     98        2
## 41 FirstYear   M    No Olympic      Math       15  2     71    150        1
## 42    Junior   M    No Olympic    Verbal        5 14     73    159        1
## 43    Senior   M    No Olympic    Verbal        7 20     72    174        1
## 44 Sophomore   M    No Olympic      Math       15 20     74    160        1
## 45    Senior   M    No Olympic      Math        8 10     70    165        1
## 46 Sophomore   F    No Olympic      Math       14  3     69    161        1
## 47    Senior   F    No   Nobel      Math        4 14     64    130        2
## 48    Junior   M    No Olympic      Math       15  0     72    175        2
## 49    Senior   M    No Olympic      Math        4 20     70    255        2
## 50    Junior   M    No Olympic    Verbal       15  2     65    160        4
## 51 FirstYear   M    No Academy    Verbal        3  6     72    160        0
## 52    Junior   F    No Academy      Math        3 15     63     95        0
## 53 Sophomore   F    No Olympic      Math       15  3     64    115        2
## 54 Sophomore   F    No Academy      Math       20  2     64    120        1
## 55 FirstYear   F    No   Nobel    Verbal        3  1     65    135        2
## 56 Sophomore   M    No Academy      Math        6  7     73    180        1
## 57    Senior   M    No   Nobel      Math       12  7     71    155        0
## 58 FirstYear   F    No Olympic    Verbal        4  3     66    110        2
## 59 FirstYear   M    No Olympic    Verbal       20 12     73    215        2
## 60 Sophomore   F    No Olympic      Math       10  3     65    140        3
## 61 FirstYear   M    No Olympic    Verbal       10 20     72    195        2
## 62 Sophomore   M    No   Nobel    Verbal        4  8     73    185        2
## 63 Sophomore   M    No   Nobel    Verbal        9  0     70    185        2
## 64    Senior   M    No Olympic    Verbal       12 12     79    209        1
## 65    Senior   F    No Olympic      Math        2  6     67    145        3
## 66 FirstYear   F   Yes   Nobel    Verbal        2  1     68    180        2
## 67    Senior   M   Yes   Nobel      Math        5 25     69    170        1
## 68 Sophomore   F   Yes Olympic      Math        5  3     66    135        3
## 69 FirstYear   M   Yes Olympic      Math        6 25     72    165        2
## 70 Sophomore   F   Yes   Nobel      Math       10 10     65    137        0
## 71 Sophomore   M   Yes   Nobel      Math        4  1     70    147        2
## 72    Senior   F   Yes Olympic      Math        5  4     66    150        1
## 73    Junior   F   Yes   Nobel      Math       17  2     67    155        2
## 74 Sophomore   M   Yes   Nobel    Verbal        7 10     71    160        2
## 75 Sophomore   F   Yes   Nobel    Verbal        2  0     83    130        1
## 76 Sophomore   M   Yes Olympic      Math        8 10     61    180        2
## 77 Sophomore   F   Yes   Nobel    Verbal        1  1     65    150        2
## 78 FirstYear   M   Yes Olympic    Verbal       14  5     77    205        2
## 79 Sophomore   F   Yes Olympic      Math       12  5     60    115        0
##    BirthOrder VerbalSAT MathSAT  SAT  GPA Pulse Piercings
## 1           4       540     670 1210 3.13    54         0
## 2           2       520     630 1150 2.50    66         3
## 3           1       550     560 1110 2.55   130         0
## 4           1       490     630 1120 3.10    78         0
## 5           1       720     450 1170 2.70    40         6
## 6           2       600     550 1150 3.20    80         4
## 7           1       640     680 1320 2.77    94         8
## 8           1       660     710 1370 3.30    77         0
## 9           8       670     700 1370 3.70    94         2
## 10          2       500     670 1170 2.09    63         2
## 11          3       650     650 1300 3.08    66         4
## 12          2       590     610 1200 3.86    59         4
## 13          1       600     600 1200 3.00    88         4
## 14          1       700     650 1350 3.00    59         0
## 15          1       610     800 1410 3.35    64         2
## 16          2       550     450 1000 3.30    72         5
## 17          2       550     640 1190 3.40    74         2
## 18          8       560     570 1130 2.90    70         2
## 19          4       560     620 1180 3.50    58         0
## 20          2       550     650 1200 3.00    48         0
## 21          2       550     680 1230 3.30    74         0
## 22          2       700     720 1420 3.70    60         0
## 23          1       610     590 1200 3.48    74         2
## 24          2       570     580 1150 3.40    70         0
## 25          1       550     560 1110 2.50    74         0
## 26          2       500     500 1000 3.30    60         0
## 27          3       610     620 1230 3.50    55         0
## 28          6       610     650 1260 3.79    82         1
## 29          2       500     560 1060 3.30    68         0
## 30          2       640     640 1280 2.90    83         0
## 31          2       490     520 1010 2.68    53         2
## 32          2       560     580 1140 3.28    72         4
## 33          1       560     640 1200 3.51    86         0
## 34          1       470     600 1070 2.60    67         4
## 35          1       680     670 1350 3.85    89         2
## 36         NA       570     570 1140 2.40    48         4
## 37          1       630     590 1220 3.40    64         0
## 38          3       580     540 1120 2.40    73         7
## 39          1       550     500 1050 3.00    80         2
## 40          2       490     550 1040 3.10    85         5
## 41          1       590     650 1240 2.94    60         0
## 42          1       620     620 1240 3.31    61         0
## 43          2       560     550 1110 3.30    80         0
## 44          2       630     690 1320 2.90    70         0
## 45          2       600     630 1230 3.40    61         0
## 46          2       550     650 1200 3.16    58         2
## 47          2       640     730 1370 3.84    88         4
## 48          1       650     670 1320 3.60    68         1
## 49          2       420     520  940 2.36    68         0
## 50          4       500     480  980 2.90    35         0
## 51          1       620     600 1220 3.00    90         0
## 52          1       600     660 1260 3.30    88         4
## 53          2       580     680 1260 3.70    67         2
## 54          1       490     520 1010 2.90    71         2
## 55          3       630     620 1250 3.60    68         2
## 56          2       600     670 1270 3.56    73         0
## 57          1       590     610 1200 3.70    55         2
## 58          1       550     520 1070 4.00    78         5
## 59          3       600     600 1200 3.40    96         0
## 60          4       600     650 1250 3.30    73         5
## 61          2       600     600 1200 3.10    60         1
## 62          1       650     530 1180 2.50    80         0
## 63          1       650     650 1300 3.20    96         0
## 64          1       560     520 1080 3.10    49         0
## 65          2       540     640 1180 3.50    62         5
## 66          3       680     610 1290 3.25    80         5
## 67          1       500     650 1150 3.30    70         0
## 68          2       570     580 1150 3.25    78         4
## 69          1       540     550 1090 2.83    75         0
## 70          1       550     560 1110 3.30    42         5
## 71          2       680     750 1430 3.60    80         0
## 72          2       630     730 1360 3.70    72         2
## 73          1       650     670 1320 2.83    96         6
## 74          3       680     650 1330 3.30    95         0
## 75          1       550     540 1090 3.44    80         3
## 76          1       600     620 1220 3.00    74         0
## 77          2       540     450  990 3.27    78         2
## 78          2       550     550 1100 2.30    72         0
## 79          1       500     510 1010 2.60    91         5
fourthElement <- StudentSurvey[4,1]
fourthElement
## [1] "Junior"