Statistics Study Guide

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I understand that I must submit my work for credit at the end of the test. I UNDERSTAND that I can lose points (partial credit) for not submitting the appropriate items.

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• No

1. What is the joint relative frequency of males who prefer dogs?

• 0.58
• 0.23
• 0.22
• 0.45
• 0.29

2. Consider the data collected from an analysis of instrument types in two different city orchestras. Which of the following statements are accurate? Select all that apply.

• Bridgeville's orchestra has more total instruments than Smyrna's orchestra.
• There are more strings than percussion and keyboard/harps combined.
• There are more brass instruments in total than any other type of instrument.
• There are a total of 112 instruments between the two orchestras.
• Both cities have the same amount of strings.

3. Which statement is a conditional relative frequency shown with the correct supporting ratio.

• The ratio of students who like Berry Bomb the best is 16/39.
• The ratio of 9th graders who like Yellow Energy is 11/39.
• The ratio of students who are 10th graders who like Yellow Energy is 12/21.
• The ratio of students who who are 10th graders who like Yellow Energy is 12/23.

4. Which of the following statement are true? Select all that apply.

• The conditional relative frequency of those who passed the posttest is 13/20, 0.65.
• Of those who took the pretest, those who failed had a conditional relative frequency of 14/21, 0.67.
• The marginal relative frequency of those who pretest and postest are the same.
• Of the students who passed, half passed the pretest.
• Of those who failed, 8 failed the pretest.

5. What is the joint relative frequency of those of take Medication 1 who are under 50, and what is the marginal relative frequency of those 50 and over.

• 0.07 and 0.72
• 0.07 and 0.67
• 0.60 and 0.72
• 0.60 and 0.33
• 0.07 and 0.28

#6 Choose the correct statements. Select all that apply.

• The joint relative frequency for people WITHOUT children who prefer a beach vacation is .28 or 28%.
• The joint relative frequency for people WITH children who prefer a beach vacation is .28 or 28%.
• The marginal relative frequency for those who have children is .59 or 59%.
• The marginal relative frequency for those who prefer the mountain vacation is .37 or 37%.