Scatterplots Question Preview (ID: 62862)
Scatterplots.
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Describe the type of association you should see with the following variables: the length of the movie and the number or actors in a movie.
a) positive association
b) negative association
c) no association
d) perimeter
Describe the type of association you should see with the following variables: the number of hours a musician spends practicing and the number of mistakes the musician makes in a performance.
a) positive association
b) negative association
c) no association
d) area
Which statement best describes a scatter plot with a positive association?
a) the points increase from left to right
b) the points slope downward from left to right
c) the points are scattered all over the graph
d) there is an unhappy face on the graph
George is looking at two sets of numerical data and sees that as one set decreases, the other set also decreases. What type of association is this?
a) Positive Association
b) Negative Association
c) No Association
d) Dilation
The first variable in a scatter plot is the square footage of a building. Give an example of a second variable that would likely result in a positive association between the variables.
a) number of guinea pigs that live in the building
b) number of noisy neighbors
c) number of parks nearby
d) cost of utilities
Which has a stronger association?
a) data points are closer together
b) data points are spread far apart
c) data points are in clusters
d) data does not exist
Which of the following best describes an outlier in a scatter plot?
a) A) A point that falls in line with the majority of the data
b) B) A point that falls outside the general trend of the data
c) C) A point that is located at the center of the data
d) D) A point that is located at the end of the data
Which of the following best describes a cluster in a scatter plot?
a) A) A group of data points that are widely spread out.
b) B) A group of data points that are randomly distributed.
c) C) A group of data points that are closely packed together.
d) D) A single data point that stands out from the rest.
A scatter plot was made with a trend line that had an equation of y= 1/4 x +85 where y is the number of flu cases and x is th e total number of students who received the flu vaccine. Predict the number of flu cases if 300 students got the vaccine.
a) 300 cases
b) 100 cases
c) 50 cases
d) 10 cases
A scatter plot was made with a trend line that had an equation of y= 1/4 x +85 where y is the number of flu cases and x is the total number of students who received the flu vaccine. Predict how many kids got the vaccine if the school had 65 cases.
a) 80 Students
b) 50 students
c) 10 students
d) 500 students
Find the mean absolute deviation of the set of values. Round to the nearest tenth. 44, 39, 47, 38, 38, 41, 40
a) 40
b) 2.6
c) 41.1
d) 2.4
The amount of money Ingrid spent over the last five days eating out is shown. 5, 16, 8, 9, 22. What is the mean absolute deviation?
a) 5.4
b) 5.8
c) 5.6
d) 15
What is the Mean Absolute Deviation (MAD) often used for in data analysis?
a) A. To determine the range of a dataset
b) B. To calculate the standard deviation
c) C. To measure the variability in a dataset
d) D. To find the median of a dataset
Ingrid's friend Ben kept track of the amount he spent eating out each day over the last 5 days. The mean absolute deviation of his data set was 8.2. Which statement below is true?
a) The average amount that Ben spent each day is $8.20.
b) The average distance from the amount Ben spent each day and the mean is 8.2.
c) Ben ate spaghetti and meatballs each day.
d) Ben spent $8.20 on each day on the tip.
Which is a true statement about two numerical data sets that have a negative association?
a) As one variable increases, the other variable does not change.
b) As one variable increases, the other variable increases.
c) As one variable decreases, the other variable decreases.
d) As one variable increases, the other variable decreases.
Find the mean absolute deviation of this set of values: 18, 2, 16, 24, 50
a) 5
b) 25
c) 24
d) 12
Which of the following is an example of a method to create a random sample representing the population of all students at a school?
a) Put the names of all students into a bag and select a group of names.
b) Ask teachers to nominate their two favorite students and use the list of names given.
c) Assign the students in athletics a number and use a random number generator to select a group of names.
d) All of the above would create random samples.
What is a random sample in statistics?
a) Selecting every 5th individual from a group for data collection
b) Choosing a group that best represents the whole population
c) Specially choosing individuals that confirm a certain theory
d) Picking individuals randomly from a group so each person has an equal chance of being selected
A set of data has a mean absolute deviation of 1.8. What can we assume is true about the data?
a) The average of the set of values is a very small value.
b) The smallest value in the data set is 1.8.
c) The difference in the largest value and the smallest value is 1.8.
d) The average distance that each data point is from the mean is 1.8
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