What is true about the following line of R code?

rnorm(10, 11, 12)

Question

What is true about the following line of R code?

rnorm(10, 11, 12)

BlackTom AI · Accepted Answer

When analyzing the code snippet, different options hinge on how the rnorm function interprets its arguments.
Option A: 'We do not know what the size of the generated sample will be.' This is incorrect because the first argument to rnorm is n, which explicitly specifies the sample size, so the size is known.
Option B: 'It generates a sample of size 10.' This is the correct interpretation: in rnorm(10, 11, 12), 10 is the first argument (n) and defines the number of observations to generate, regardless of the mean or standard deviation.
Option C: 'It generates a sample of size 12.' This confuses the third argument (sd, the standard deviation) with sample size; sd is not related to the number of observations.
Option D: 'It generates a sample of size 11.' This confuses the second argument (mean) with sample size; the mean determines the center of the distribution, not how many numbers are produced.

STA304H1 S Module 3 Practice Problems

What is true about the following line of R code? rnorm(10, 11, 12)

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