Ch2 Exercises Class Opener

Convert to percent 0.0723

• 7.23%
• 72.3%
• 0.723%
• 723%
• I'm really not sure

Convert to percent 0.00123

• 0.123%
• 12.3%
• 123%
• 0.0123%
• I'm really not sure

Round to 1 decimal place: 7.349%

• 7.3%

• 7.4%

• 7%

• I'm really not sure

Round to two decimal places: 3.2131%

• 3.21%
• 3.22%
• 3.23%
• 3.20%
• I'm really not sure

Round to two decimal places: 3.2147%

• 3.21%

• 3.22%

• 3.20%

• 3.23%

• I'm really not sure

Round to two decimal places: 3.2153%

• 3.22%
• 3.21%
• 3.20%
• 3.23%
• I'm really not sure

Convert to percent and round to two decimal places: 0.053214

• 5.32%
• 53.21%
• 0.53%
• 532.14%
• I'm really not sure

The table shows whether students in an introductory statistics class like dogs and/or cats. What percentage of students in the class like both cats and dogs?

• 64%

• 90%

• 58%

• 65%

• I'm not sure

Answer explanation

You have to use 335 as the denominator because that is how many students are in the class.

The table shows whether students in an introductory statistics class like dogs and/or cats. What percentage of students who like cats also like dogs?

• 64%

• 90%

• 58%

• 65%

• I'm not sure

Answer explanation

This is a conditional question. We are told that this about students that like cats. So 215 must be the denominator.

The table shows how a company's employees commute to work. What percentage of employees takes the bus?

• 5%

• 16%

• 22%

• 30%

• I'm not sure

Answer explanation

There are 126 employees that take the bus. There are 420 total employees. So, 126/420.