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Worksheet titled "Two-Way Frequency Tables Practice" featuring a table and questions related to gender and shoe preference data.

Two-way frequency table worksheet with a table showing preferences for Nike and Adidas shoes by gender, including questions about relative frequencies and associations.

Two-way frequency table worksheet with a table showing preferences for Nike and Adidas shoes by gender, including questions about relative frequencies and associations.

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Show Answer Key & Explanations Step-by-step solution for: Two Way Frequency Tables and Relative Frequency Notes
Since I can't view images directly, I’ll help you solve the problem based on the information you've provided in your text. Let's work through the two-way frequency table and answer each question step by step.

We are given a two-way frequency table about students' shoe preferences (Nike vs. Adidas), categorized by gender (Boys and Girls). The table is partially filled:

```
Prefer Nike Prefer Adidas TOTAL
Boys 3 19 35
Girls ? ? ?
TOTAL 31 20 51
```

Let’s first complete the table using the given totals.

---

Step 1: Complete the Table



We know:
- Total number of students = 51
- Total who prefer Nike = 31
- Total who prefer Adidas = 20
- Total boys = 35
- Boys who prefer Nike = 3
- Boys who prefer Adidas = 19

So:
- Girls who prefer Nike = Total Nike - Boys who prefer Nike
= 31 - 3 = 28

- Girls who prefer Adidas = Total Adidas - Boys who prefer Adidas
= 20 - 19 = 1

- Total girls = Total students - Total boys
= 51 - 35 = 16

Now fill in the completed table:

```
Prefer Nike Prefer Adidas TOTAL
Boys 3 19 35
Girls 28 1 16
TOTAL 31 20 51
```

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Now let’s answer the questions.

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6. What is the relative frequency that a boy was polled?



Relative frequency = (Number of boys) / (Total students)
= 35 / 51 ≈ 0.686 or 68.6%

Answer:0.686

---

7. What is the relative frequency of selecting a boy out of the people who prefer Adidas shoes?



This is a conditional probability: Among those who prefer Adidas, what proportion are boys?

Number of people who prefer Adidas = 20
Number of boys who prefer Adidas = 19

Relative frequency = 19 / 20 = 0.95 or 95%

Answer: 0.95

---

8. Does there appear to be an association between being a boy and preferring Adidas shoes?



Yes. From the data:
- 19 out of 20 people who prefer Adidas are boys → very strong tendency
- Only 1 girl prefers Adidas
- This suggests that boys are much more likely to prefer Adidas than girls.

Answer: Yes, there appears to be a strong association — most Adidas wearers are boys.

---

9. What is the relative frequency that a girl was polled?



Total girls = 16
Total students = 51

Relative frequency = 16 / 51 ≈ 0.314 or 31.4%

Answer:0.314

---

10. What is the relative frequency of selecting a girl out of the people who prefer Adidas shoes?



From earlier:
- People who prefer Adidas = 20
- Girls who prefer Adidas = 1

Relative frequency = 1 / 20 = 0.05 or 5%

Answer: 0.05

---

11. Does there appear to be an association between being a girl and preferring Adidas shoes?



No. Only 1 out of 20 Adidas wearers is a girl → very low.

Also, girls are much more likely to prefer Nike (28 out of 16 girls total → all but one girl prefer Nike).

So, girls are not associated with preferring Adidas — in fact, they are strongly associated with preferring Nike.

Answer: No, there does not appear to be an association; girls are unlikely to prefer Adidas.

---

12. Write a sentence that summarizes what the data in the poll shows.



Answer: The data shows that boys are much more likely to prefer Adidas shoes, while girls overwhelmingly prefer Nike shoes.

---

Final Answers Summary:



6. 0.686
7. 0.95
8. Yes, there is a strong association between being a boy and preferring Adidas.
9. 0.314
10. 0.05
11. No, there does not appear to be an association between being a girl and preferring Adidas.
12. The data shows that boys are much more likely to prefer Adidas shoes, while girls overwhelmingly prefer Nike shoes.

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