Probability & Statistics For Engineers and Scientists Chapter 1 Q1.1

Q: The following measurements were recorded for the drying time, in hours, of a certain brand of latex paint.
 3.4 2.5 4.8 2.9 3.6
2.8 3.3 5.6 3.7 2.8
4.4 4.0 5.2 3.0 4.8

Assume that the measurements are a simple random
sample.
(a) What is the sample size for the above sample? (b) Calculate the sample mean for these data.
(c) Calculate the sample median.
(d) Plot the data by way of a dot plot.
(e) Compute the 20% trimmed mean for the above data set.
(f ) Is the sample mean for these data more or less de- scriptive as a center of location than the
trimmed mean?

Sol :