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HJ_beginner
  • Member for 6 years, 7 months
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  • California, United States
17 votes
4 answers
2k views

Beginner questions about how functions work

16 votes
3 answers
3k views

How to interpret 2 variables separated by a comma in chained inequalities

6 votes
3 answers
985 views

Beginner probability question about the phrase "order doesn't matter"

6 votes
1 answer
233 views

Seating arrangements: Question about the book solution and summation indices

5 votes
1 answer
130 views

Why are these two summations in the calculation of the variance equal?

5 votes
3 answers
738 views

Quick question about a picture - area under a normal distribution is always 1

4 votes
1 answer
220 views

1st Yr Probability: question about marginal and joint pdfs for $3$ uniform continuous independent random variables

4 votes
3 answers
107 views

Novice question: what values of $x$ satisfy $\frac{x^2}{x} \le 0 $

4 votes
1 answer
113 views

Quick questions about summation notation used in my book

4 votes
1 answer
58 views

Need help fixing/clarifying my thinking about iid RVs after learning some 1st Yr Stats

3 votes
2 answers
637 views

Coupon Collecting Problem: $4$ coupons with $p_1 = p_2 = \frac{1}{8}$ and $p_3 = p_4 = \frac{3}{8}$

3 votes
1 answer
66 views

1st Yr Probability: Independence of flipping a fair coin twice

2 votes
1 answer
207 views

Coupon Collecting Problem: Condition on the order of coupons you see

2 votes
1 answer
151 views

Quick notation questions about linear regression: $Y_i = \alpha + \beta x_i + e$

2 votes
2 answers
160 views

1st Yr Statistics Question: Create an approximate $\alpha$ level test of $H_0 : p_1 = p_2$

2 votes
1 answer
589 views

Birthday problem with $110$ people - need help fixing my approach to get the variance

2 votes
1 answer
70 views

1st Yr Probability: what is wrong with my approach? (using indicator RVs)

2 votes
1 answer
115 views

Having problems seeing how two events are conditionally independent (Craps dice game)

2 votes
1 answer
64 views

Entry level questions about the trig function sine

2 votes
1 answer
422 views

Do people care about "Six Sigma" for probability distributions that are not Normal?

2 votes
2 answers
449 views

Beginner probability question: Bimodal distribution (ie like some Yelp reviews)

2 votes
0 answers
95 views

Beginner probability question: Can you help me refine my understanding of the Linearity of Expectation?

1 vote
1 answer
105 views

Beginner conceptual question about the relationship between probability density and distribution functions

1 vote
1 answer
281 views

1st Year Probability Question: In a 40 game season, what is the probability of a certain season outcome?

1 vote
0 answers
66 views

Conditional continuous distributions - need help understanding answer to a beginner example

1 vote
2 answers
64 views

For two standard uniform RVs is there a way to find the $E[|U_1-U_2|]$ using the linearity rule, ie $E[X+Y] =E[X] + E[Y]$?

1 vote
0 answers
3k views

Derivation of the Safety Stock Formula on Wikipedia

1 vote
0 answers
37 views

Beginner probability question: show that self confidence goes up after a confidence building event

1 vote
1 answer
44 views

Two questions about Independence of two RVs (building understanding)

1 vote
1 answer
188 views

How do you calculate $E[U_1 | U_1 > U_2]$ where $U_1$ and $U_2$ are independent Uniform RVs from $(0,1)$