The supervisor of a tourist information desk at a local airport ...

[Evvie72]

The supervisor of a tourist information desk at a local airport is interested in how long it takes an employee to serve a customer. Using a stopwatch, he measures the amount of time it takes for each of 10 customers.
 
  These times, measured in minutes, are reported as follows: 2.3, 1.5, 3.9, 0.6, 2.7, 3.1, 2.8, 0.9, 1.4, and 2.6. Calculate the standard deviation and the interquartile range.

Question 2

Which of the following tests employs matched-pairs sampling?
 
  A) The Wilcoxon signed rank test
  B) The Wilcoxon rank sum test
  C) The Mann-Whitney test
  D) The Durbin-Watson test

[ladyjames123]

Answer to Question 1

Standard deviation = 1.046, IQR = Q3 - Q1 = 2.875 - 1.275 = 1.6.

Answer to Question 2

A