Question
In: Statistics and Probability
A simple random sample of 70 Stat 20 students is taken from my class of 340...
A simple random sample of 70 Stat 20 students is taken from my class of 340 students; the average number of units these students is taking is 16.1, with an SD of 1.9. Last spring I taught a smaller class with only 96 students, and those 96 students took an average number of units of 15.5, with an SD of 2.2. Do a hypothesis test to decide whether the average number of units for this semester's Stat 20 class is different than the average number of units for my class last spring.
Solutions
Expert Solution
Answer:
Let 
denote average number of units for Stat 20 class.
There
is sufficient evidence to conclude that the average number of units
for this semester's Stat 20 class is different than the average
number of units for other class taught in last spring.
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