One hundred students were given an Algebra test. A random sample
of ten students was taken out of class of 800 enrolled students.
The time it took each student to complete the test is recorded
below.
22.2, 23.7, 16.8, 18.3, 19.7, 16.9, 17.2, 18.5, 21.0, and
19.7
a. Find the mean, variance and standard deviation for this
sample of ten students
b. Construct a 95% confidence interval for the population mean
time to complete this Algebra test.
c. Test if...