Skip to main content

Back to the full dot-point answer

United StatesStatisticsQuick questions

Unit 4: Probability, Random Variables, and Probability Distributions

Quick questions on Combining random variables - AP Statistics Unit 4

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
Show answer
Independent XX and YY have σX=6\sigma_X = 6, σY=8\sigma_Y = 8. Find σXY\sigma_{X-Y}. [2 points]
What is q2?
Show answer
A variable WW has sd 44. Find the sd of 2W+52W + 5. [1 point]

Have a question we have not covered?

This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.

All StatisticsQ&A pages