Description
Questions
Exercises 8.1, 8.8
Q3.
The following are samples obtained from a population that follows a normal distribution
69, 47, 175, 70, 53, 64, 74, 52, 58, 53, 64, 49, 70, 65, 70, 16, 67, 55, 42, 72, 61, 65, 77, 70, 60, 39
i. Find the Sample mean, variance and standard deviation
ii. Use them to estimate the parameters of the normal distribution (µ and σ)
iii. Find and eliminate any possible outliers.
a. Recalculate the sample mean, variance and standard deviation.
b. Use the new values to recalculate the parameters of normal distribution.
c. If the population followed Normal (60, 10), did eliminating outliers improve the accuracy
of your estimate?
