## MAT 210 Introduction to Business Statistics Exam

Proctored Final Examination

1. Assume you have a data set From a normally distributed random variable. Answer the following questions about it.

a. Will the random variable be discrete, continuous, or neither? How do you know?

b. Will the data be qualitative or quantitative? How do you Know?

2. Assume the following data were gathered by a manufacturer of a robotics component, in units of days of continuous use until the component fails. There are 60 measurements in this data set. Show a histogram of this data set with 10 bins of equal size, spanning the range from the data minimum to the data maximum.

142, 147, 127, 161, 145, 137, 122, 123, 141, 139, 139 135, 135, 130, 147, 118, 154, 133, 136, 129, 139, 131 143, 130, 160, 127, 127, 145, 144, 155, 128, 124,144 133, 136, 133, 151, 131, 133, 119, 122, 139, 128, 121 142, 136, 148, 136, 121, 131, 125, 120, 123, 145, 140 150, 136, 135, 133, 134

3. A university has been tracking the percentage of alumni giving to its annual fund each year for the past 10 years. The data is given here.

14% 13% 15% 21% 19% 24% 25% 28% 25% 31%