The following table shows data for the 8 longest roller coasters in the world as of 2015.
Which of the following variables is categorical?
Length
Type
Speed
Height
Drop
A market researcher asked a group of men and women to choose their favorite color design from a sample of advertisements. The results are shown in the following table.
Which of the following statements is not supported by the table?
More men than women chose the color design red with black.
More women than men chose the color design yellow with black.
For men, the number who chose a design with black was greater than the number who chose a design with blue.
The color design chosen by the most people was green with blue.
The total number of men surveyed by the market researcher was equal to the total number of women surveyed by the market researcher.
Which of the following questions about cars in a school parking lot will allow for the collection of a set of categorical data?
How many blue cars are in the lot?
What are the gas mileages, in miles per gallon, of the cars in the lot?
What are the weights, in pounds, of the cars in the lot?
What is the number of cars in the lot with out-of-state license plates?
What are the colors of the cars in the lot?
The following dotplot shows the scores of 25 people who played an online trivia game.
Which of the following statements is the best description of the distribution of scores?
(You should know each bold vocabulary word. Search for an image of any you do not.)
The distribution is roughly symmetric.
The distribution is roughly uniform.
The distribution is skewed left.
The distribution is skewed right.
The distribution is bimodal.
In a standard golf tournament, golfers play 18 holes of golf on each of 4 consecutive days. For each hole, golfers keep track of the number of times they hit the ball (strokes) before the ball goes into the cup. A golfer’s score for the tournament is the total number of strokes needed to complete the tournament. The boxplots below summarize the scores for golfers who competed in tournament 1 and golfers who competed in tournament 2.
Based on the boxplots, which of the following statements must be true?
More golfers played in tournament 1 than in tournament 2.
In both tournaments, at least half the golfers completed the tournament with a score less than 288.
The number of golfers who completed tournament 1 with a score less than 288 was greater than the number of golfers who completed tournament 2 with a score less than 288.
The range of scores for tournament 1 is less than the range of scores for tournament 2.
The score of the golfer with the least score in tournament 1 was greater than the score of the golfer with the least score in tournament 2.
Data were collected on 100 United States coins minted in 2018. Which of the following represents a quantitative variable for the data collected?
The type of metal used in the coin
The value of the coin
The color of the coin
The person depicted on the face of the coin
The location where the coin was minted
A car rental agency has two locations in a city. The boxplots below summarize the miles driven for one day of single-day car rentals at each location.
Based on the boxplots, which statement provides the best comparison of the two locations?
The number of single-day rentals is greater for location A than for location B.
The number of single-day rentals is less for location A than for location B.
Compared with location A, the miles driven for location B display more variability, and the median is greater.
Compared with location A, the miles driven for location B display less variability, and the median is greater.
Compared with location A, the miles driven for location B display less variability, and the median is about the same.
The following pie chart summarizes the results of a survey given to airlines about the primary reason for flight delays.
Which of the following statements is supported by the pie chart?
The reason given most frequently was runway closure.
More delays were caused by weather than by all other reasons combined.
More delays were caused by runway closure than were caused by overbooking.
Overbooking and runway closure accounted for greater than one-fourth of the reasons given for flight delays.
The combined percentage for other and runway closure was equal to the percentage for overbooking.
Which of the following statistics is defined as the 50th percentile?
The mean
The median
The mode
The interquartile range
The standard deviation
A survey is conducted on the use of Facebook of adults in the United States, where 12,000 adults are surveyed and 9,450 adults answered that they did use Facebook.
What is the Sample?
The adults in the United States
The 9,450 adults that said yes
The 12,000 adults surveyed
The adults throughout the world
Identify the following data set:
…. every single Y-Phone’s maximum volume is measured before being packaged at a manufacturing plant.
Sample
Population
A traffic cop was stopping every 5th car to check for insurance and license. What type of sampling method is the cop using?
Simple Random Sampling
Systematic Sampling
Convenience Sampling
Stratified Sampling
Which type of sampling method is being employed in the following example:
“A study was being conducted after a tsunami. The researcher was trying to assess the needs of the victims in a single downtown high rise apartment building . So, she sent a messenger to ask one person on each floor what their needs were to get an idea of what was needed to support the people in the building.”
Simple Random Sampling
Stratified Sampling
Cluster Sampling
Sampling of Convenience
Systematic Sampling
Justin and TJ are servers at a local restaurant. The table below shows the tips they earned.
Which student has a higher mean tip for the week and by how much?
Justin’s mean tip is $4 more than TJ’s mean tip.
TJ’s mean tip is $3 more than Justin’s mean tip.
TJ’s mean tip is $4 more than Justin’s mean tip.
Justin’s mean tip is $3 more than TJ’s mean tip.
Consider the data set:
4, 5, 5, 5, 6, 6, 8, 9, 11, 12
What would happen to the median if another data point of 17 was added to the data set?
The median would go down by 0.9
The median would go up by 0.9
The median would go up by 14
The median would remain the same
Consider the data set represented by the dot plot: