2)

Each person who applies for an assembly job at Robert's Electronics is given a mechanical aptitude test. One part of the test involves assembling a plug-in unit based on numbered instructions. A sample of the length of time it took 42 persons to assemble the unit was organized into the following frequency distribution.

Length of Time (in minutes)	Number
1 up to 4	4
4 up to 7	8
7 up to 10	14
10 up to 13	9
13 up to 16	5
16 up to 19	2

What is the mean (in minutes)?

Multiple Choice

• 3.89

• 8.53

• 11.50

• 9.14

The number of students at a local university increased from 1,900 students to 4,500 students in 10 years. Based on a geometric mean, the university grew at an average percentage rate of Multiple Choice 1.090 percent per year. O 190 students per year. 1,900 students per year. 9.0 percent per year