AP Stats Midterm Flashcards

Questions and Answers

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?

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?

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?

The number of books a person finished reading last month Signup and view all the answers

Which of the following variables is categorical?

Type Signup and view all the answers

How would you classify the data represented by the number of video games sold each day?

Quantitative and discrete Signup and view all the answers

What does the pie chart about primary reasons for flight delays support?

More delays were caused by weather than by all other reasons combined. Signup and view all the answers

Which characteristic must remain the same if the interval size of a histogram is decreased?

The sum of the frequencies Signup and view all the answers

How would you describe the shape of the distribution of used car prices?

Skewed to the right (positively skewed) Signup and view all the answers

What statement is supported by the bar chart regarding undecided students?

For the category undecided, the number of students from Liberty High School was 4 greater than the number of students from Central High School. Signup and view all the answers

Which statement is not supported by the frequency table showing favorite flavors of ice cream?

One-half of the students chose vanilla or chocolate. Signup and view all the answers

For students in grade 7, what must be true regarding activity choices?

The number who chose activity C was greater than the number who chose activity B. Signup and view all the answers

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.

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!