Fifty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6   2 15     3       Determine the Cumulative Relative Frequency for taking 2 classes.  

A political action committee is interested in the proportion of all registered voters who will vote “Yes” on a measure to expand the use of solar energy. Match the vocabulary word with its corresponding example.  

A bank manager is interested in the average length of time that customers are willing to wait in line before they give up and leave the bank. Match the vocabulary word with its corresponding example.  

A politician is interested in the proportion of voters in his district that think he is doing a good job. Match the vocabulary word with its corresponding example.  

Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # Flossing per Week Frequency Relative Frequency Cumulative Relative Frequency 0 27 0.4500   1 18     3     0.9333 6 3 0.0500   7 1 0.0167   What percent of adults flossed at most 1 time per week?  

Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # Flossing per Week Frequency Relative Frequency Cumulative Relative Frequency 0 27 0.4500   1 18     3     0.9333 6 3 0.0500   7 1 0.0167   What percent of adults flossed 7 times per week? Round to one decimal place.  

200 people are asked how many siblings they have? The (incomplete) results are shown below: Siblings Frequency Relative Frequency Cumulative Relative Frequency 0 20 0.1   1 90     2 60     3 0     4       What percent of the people have exactly 4 siblings? Give your answer as a percent and not a decimal. And there is no need to type in the %.   

A restaurant owner is interested in the proportion of his customers who order dessert. He looks at 65 randomly selected receipts. Match the vocabulary word with its corresponding example.  

A smart phone manufacturer wants to determine the average battery time that its new smart phone will get. The manufacturer will test 100 smart phones. Match the strategies to their corresponding sampling techniques.  

Which of the following are reasons that a sampling technique may not be scientific. Choose all that apply.