table or two-dimensional array-like structure in which each column contains values of one variable and each row contains one set of values from each column is also called a _____________ Matrix List Vector Data frame
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A table or two-dimensional array-like structure in which each column contains values of one variable and each row contains one set of values from each column is also called a _____________
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Matrix |
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List |
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Data frame |
What is the range of sepal lengths in the iris dataset? (Hint: you will need to use the range() function for this question. It will provide you two numbers - the largest and the smallest values in the group. To find the range, can subtract the smallest value from the largest value in the console). Start by entering range(iris$Sepal.Length) into the console.
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17.1 |
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8.2 |
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0.865 |
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3.6 |
In your R console, type in the following code:
> plot(cars$dist~cars$speed, ylab = "Braking Distances, in Feet")
Which of the following statements accurately describes the result shown in your Miscellaneous Pane?
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The graph is a histogram that shows the relative frequencies of various braking distances. |
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The graph has a label on the y-axis that reads Braking Distances, in Feet . |
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The graph shows signs of auto-correlation reduction. |
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The graph has a label on the x-axis that describes the overall purpose of the plot. |
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