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The numbers of hours worked (per week) by 500 statistics students are shown below. What is the percentage of students who work at least 20 hours per week? Number of hours Frequency 000 0 70% 95% 40% 30% Question 7 0-9 10-19 20-29 30-39 25 125 200 150

The numbers of hours worked (per week) by 500 statistics students are shown below. What is the percentage of students who work at least 20 hours per week? Number of hours Frequency 000 0 70% 95% 40% 30% Question 7 0-9 10-19 20-29 30-39 25 125 200 150

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.1: Real Numbers
Problem 30E
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**The numbers of hours worked (per week) by 500 statistics students are shown below. What is the percentage of students who work at least 20 hours per week?** | Number of hours | Frequency | |-----------------|-----------| | 0–9 | 25 | | 10–19 | 125 | | 20–29 | 200 | | 30–39 | 150 | **Options:** - 70% - 95% - 40% - 30% **Explanation:** To determine the percentage of students who work at least 20 hours per week, add the frequencies of the groups working 20–29 hours and 30–39 hours: \[ 200 (20–29 hours) + 150 (30–39 hours) = 350 \text{ students} \] Next, to calculate the percentage: \[ \left(\frac{350}{500}\right) \times 100 = 70\% \] So, the correct answer is: - 70%
Transcribed Image Text:**The numbers of hours worked (per week) by 500 statistics students are shown below. What is the percentage of students who work at least 20 hours per week?** | Number of hours | Frequency | |-----------------|-----------| | 0–9 | 25 | | 10–19 | 125 | | 20–29 | 200 | | 30–39 | 150 | **Options:** - 70% - 95% - 40% - 30% **Explanation:** To determine the percentage of students who work at least 20 hours per week, add the frequencies of the groups working 20–29 hours and 30–39 hours: \[ 200 (20–29 hours) + 150 (30–39 hours) = 350 \text{ students} \] Next, to calculate the percentage: \[ \left(\frac{350}{500}\right) \times 100 = 70\% \] So, the correct answer is: - 70%
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