expanded_flashcards_statistics_video_2.csv

Question,Answer A,Answer B,Answer C,Answer D,Correct Answer,Answer Info (+ Explanation) A company is analyzing employee attendance to see if there is a pattern of low attendance on Mondays. They have recorded attendance over several weeks. Which plot should the company use to identify this pattern?,...

Question,Answer A,Answer B,Answer C,Answer D,Correct Answer,Answer Info (+ Explanation) A company is analyzing employee attendance to see if there is a pattern of low attendance on Mondays. They have recorded attendance over several weeks. Which plot should the company use to identify this pattern?,Histogram,Time plot,Bar chart,Scatter plot,B,B) Time plot. A time plot would help the company see changes in attendance over each day of the week across multiple weeks. A fitness app tracks users' weekly exercise hours. The app needs to represent the average exercise hours for different age groups. Which chart would best display this data?,Pie chart,Time plot,Bar chart,Histogram,C,C) Bar chart. Bar charts are useful for comparing averages across different categories such as age groups. An environmental scientist is studying water pollution levels in different rivers over the past decade. Which plot would help show changes in pollution levels over this period?,Histogram,Pie chart,Time plot,Stem plot,C,C) Time plot. Time plots are ideal for showing how a variable (pollution levels) changes over a long period. A school principal wants to see the relationship between students' hours of study and their final exam scores. Which type of visualization would help identify this relationship?,Scatter plot,Histogram,Bar chart,Pie chart,A,A) Scatter plot. It is best for showing relationships between two continuous variables (study hours and exam scores). A company wants to visualize the total revenue contribution of each sales region. Which chart would best show this data?,Histogram,Bar chart,Pie chart,Line graph,C,C) Pie chart. It displays the proportion of total revenue contributed by each sales region. Which plot would you choose to show changes in monthly sales over a year?,Time plot,Bar chart,Pie chart,Scatter plot,A,"A) Time plot. It is better suited for visualizing changes in a variable over time, showing trends or fluctuations." Which plot would you use to show the proportion of different car models sold in a dealership?,Relative frequency histogram,Time plot,Scatter plot,Pie chart,D,D) Pie chart. It effectively shows how each car model contributes to the total sales as a proportion of the whole. Which plot would you choose to see how the number of study hours is related to GPA?,Histogram,Scatter plot,Bar chart,Pie chart,B,"B) Scatter plot. It shows how two variables relate to each other, such as study hours and GPA." Which plot would you use to track changes in temperature over a week?,Histogram,Line graph,Bar chart,Scatter plot,B,B) Line graph. It effectively shows changes and trends in temperature over a continuous period. Which plot would be better for displaying a small dataset of exam scores?,Histogram,Line graph,Bar chart,Stem plot,D,D) Stem plot. It is suitable for small datasets as it displays individual data points. "If a histogram shows three bars with counts of 8, 12, and 20 in the intervals \[10, 20), \[20, 30), and \[30, 40), what is the total number of data points?",40,20,50,30,C,C) Total = 8 + 12 + 20 = 50 data points. "In a stem plot with a stem of 3 and leaves 1, 4, and 8, what are the values represented?","3, 4, 8","3.1, 3.4, 3.8","31, 34, 38","13, 14, 18",C,"C) The stem represents the tens place, and the leaves represent the units, forming 31, 34, and 38." "A histogram has bars with heights of 5, 10, and 15 in the intervals \[10, 20), \[20, 30), and \[30, 40). What is the total number of data points, and the mean if the midpoint values for each interval are 15, 25, and 35, respectively?","Total points = 30, Mean = 25","Total points = 40, Mean = 25","Total points = 30, Mean = 20","Total points = 30, Mean = 27",A,A) Total = 5 + 10 + 15 = 30. Mean = (5*15 + 10*25 + 15\*35)/30 = 25. "A time plot shows quarterly revenue over two years. The revenues for each quarter are \$20k, \$30k, \$35k, and \$25k. What is the total revenue for a single year?",\$80k,\$100k,\$110k,\$90k,A,A) Total revenue = \$20k + \$30k + \$35k + \$25k = \$110k per year. "A pie chart shows that 40% of employees prefer remote work, 30% prefer hybrid, and 30% prefer in-office work. If there are 300 employees, how many employees prefer hybrid work?",100,90,110,120,B,B) 30% of 300 = 90 employees prefer hybrid work.