Question

HOMEWORK: DESCRIPTIVE STATISTICS


COMPUTE ALL DESCRIPTIVE STATISTICS – mean, median, mode, quartiles, range, interquartile range, variance, standard deviation, coefficient of variation. Choose one of the following problems and convert the data to Z-scores. Check your work (you will only be able to check some of the descriptive statistics) using MS Excel.



PROBLEM 1: #colds / year; n=16 subjects

10;    8;  &n bsp; 5;    2;     3;    3;    3;    6;    4;      2;    4;    5;     4;    4;    1;    0




PROBLEM 2: average wait in minutes for a train; n=15

45
4
5
5
6
12
17
10
10
11
8
15
16
9
0




PROBLEM 3: # employee absences; n = 12 employees

1;     0; &n bsp;   1;     4;      6;      2;      2;     3;      2;     2;     1;      0




PROBLEM 4: Quiz scores ?
n = 13 students

5           0        9          10        6        10        8        0          0        7        10        0          0   





PROBLEM 5: # defects in a sample of 12 cars
(n=12)

9     3     8     8     2      2     10     10     63     22     18     15




PROBLEM 6: Time to do job (minutes)

n = 20 employees

10; 16; 15; 11; 12; 8; 8; 7; 6; 5; 9; 4; 5; 13; 14; 10; 15; 10; 12; 10




PROBLEM 7: Yield in Bushels for Farmer Jones Apple Orchard; n = 16 trees

4      4&nb sp;     2      2      3      3      1     2      2     1    10    7      8      6      5      5   




PROBLEM 8: Employee Absences at the XYZ Company three month period: n = 16 employees

9        9      7      7&nb sp;      7      10      12      0      0      1      1     3      4      5      6       8



PROBLEM 9: Number of passengers – B99 Train to JFK; n =10 randomly selected days

200       60& nbsp;     70       120      100      100      90      80      90      90