Many college and university students have obtained internship jobs. A statistics professor wants to
determine whether students in different degree programs earn different amounts. A random sample
of 4 students was selected in each of the department of Statistics, Mathematics and Physics
programs and they were asked to report how much they have earned from the previous internship. The
results (in R1000.00) are presented below.
Statistics
Mathematics
Physics
3.3
3.9
4.0
Data
2.5
5.1
6.2
4.6
3.9
6.3
5.4
6.2
5.9
The sample size
4
4
4
The sample mean
3.95
4.775
5.6
The sample variance
1.6833
1.2225
1.1667
To determine which population means differ in the internship earnings, the professor used the least
significant difference (LSD) method at 5% level of significance.
The calculated value of LSD is
Select one:
1. 1.8637.
2. 1.240.
3. 0.6515.
4. 2.179.
5. 1.420.
​