Podcast
Questions and Answers
Which of the following statements is NOT a statistical justification for the manager's plan?
Which of the following statements is NOT a statistical justification for the manager's plan?
- Five measurements provide a range of estimates for comparison.
- The measurements will provide a sufficient sample size for accuracy.
- Using the median helps minimize the effect of extreme values on the final estimate.
- The actual distance should be considered a variable, and taking five measurements allows the manager to estimate the variability in the actual distance. (correct)
What is a reasonable conclusion about the selling prices based on the graph?
What is a reasonable conclusion about the selling prices based on the graph?
- More homes sold at higher prices than lower prices.
- The value of maximum minus third quartile is less than the value of first quartile minus minimum. (correct)
- The selling prices are uniformly distributed.
- The maximum price is much higher than the minimum price.
Based on the histogram, how would best describe the distribution of the duration of the Old Faithful geyser eruptions?
Based on the histogram, how would best describe the distribution of the duration of the Old Faithful geyser eruptions?
- Normal distribution
- Two clusters, one at about 125 seconds and another at about 260 seconds (correct)
- Uniform distribution
- A single peak
Which variable can be considered discrete?
Which variable can be considered discrete?
Which of the following variables is categorical?
Which of the following variables is categorical?
How would you classify the data represented by the number of video games sold each day?
How would you classify the data represented by the number of video games sold each day?
What does the pie chart about primary reasons for flight delays support?
What does the pie chart about primary reasons for flight delays support?
Which characteristic must remain the same if the interval size of a histogram is decreased?
Which characteristic must remain the same if the interval size of a histogram is decreased?
How would you describe the shape of the distribution of used car prices?
How would you describe the shape of the distribution of used car prices?
What statement is supported by the bar chart regarding undecided students?
What statement is supported by the bar chart regarding undecided students?
Which statement is not supported by the frequency table showing favorite flavors of ice cream?
Which statement is not supported by the frequency table showing favorite flavors of ice cream?
For students in grade 7, what must be true regarding activity choices?
For students in grade 7, what must be true regarding activity choices?
Study Notes
Distance Measurement and Statistics
- The motel manager utilizes the median of five measurements for a more accurate distance estimate to Yosemite Park.
- This approach allows the capture of variability in the actual distance measurement.
Home Selling Prices
- A left-skewed distribution indicates that the maximum price minus the third quartile is less than the first quartile minus the minimum price.
Geyser Eruption Duration
- The histogram of Old Faithful geyser eruptions shows two clusters: one at around 125 seconds and another at 260 seconds, with a maximum range of 250 seconds.
Discrete Variables
- The number of books read in the previous month is an example of a discrete variable.
Categorical Variables
- In the data of the world’s longest roller coasters, "Type" is categorized as a categorical variable.
Video Game Sales Data
- The classification of daily video game sales is quantitative and discrete, reflecting countable and measurable data.
Flight Delay Reasons
- A pie chart indicates that weather is the primary cause of delays, surpassing all other combined reasons.
Histogram Interval Size
- Decreasing interval sizes in a histogram will not affect the sum of the frequencies, which remains constant.
Used Car Prices Distribution
- The distribution of used car prices at the dealership is described as skewed to the right, indicating a concentration of lower prices.
Student Future Plans
- The bar chart shows that undecided responses were 4 greater from Liberty High School compared to Central High School.
Ice Cream Flavor Preferences
- The frequency table analysis does not support the claim that half of the students chose vanilla or chocolate flavors.
Volunteer Activity Participation
- In grade 7, more students chose activity C over activity B, as depicted in the distribution graph.
Animal Weight Classification
- A veterinarian gathered data on weights of 1,000 pets categorized as healthy, underweight, or overweight; the type of graph to show the relationship between type of animal and weight category is not specified but should effectively illustrate the relationship.
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Description
This quiz features flashcards that cover key concepts essential for the AP Statistics midterm exam. Test your understanding of statistical estimations, including measuring distances and the importance of using the median. Perfect for students preparing for their upcoming exams!
