Lemma
EasyDiscrete distributions
OpenStax, Introductory Statistics 2e §4.2 Mean or Expected Value and Standard Deviation · Example 2 · Probability · Discrete distributions

Mean or Expected Value and Standard Deviation · Example 2

Toss a fair, six-sided die twice. Let X = the number of faces that show an even number. Construct a table like and calculate the mean μ and standard deviation σ of X.

~5 minWritten answer · check your work with Lemma

OpenStax, Introductory Statistics 2e · §4.2 Mean or Expected Value and Standard Deviation · Example 2

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Attach photos of your pages (up to 3) or one PDF — or check what you typed above. Lemma reads the work and verifies the reasoning, not just the answer.

Your first check today doesn't need an account.

Your photos and PDFs are read once and not stored — only the transcription is kept.