Document 629k

I create cheat sheets after giving the same lesson over and over again. This one covers probability in statistics.

Document 629k

I create cheat sheets after giving the same lesson over and over again. This one covers probability in statistics.

If X is χ2(12), find constants a and b such that P(a < X < b) = 0.90 and P(X < a) = 0.05.

QUESTIONS: What is the probability that exactly 2 of them are dogs? If the store has only 9 dogs, what is the probability that they have sufficient dogs for sale that day...

11 trades won and 32 trades lost on the first trade of the day. 10 trades won and 14 trades lost on the second trade of the day. 4 trades won and 5 trades lost on the third trade of the day...

As Program Director of a Radio Station, you receive a report from an independent service that shows that out of 100 songs played, the same song was played 7 times. Using the Empirical Approach, calculate...

It's a problem of 10 grade from the lesson of probability ...please help

A pharma company tests 100 drugs on human volunteers. Probability of failure in Phase I = 50%, . phase II = 30% and phase III = 40%: So how many drugs will successfully Need...

Need to know P(A or B)

4 cards are drawn from a standard deck without replacement. What is the probability that at least one of the cards drawn is a spade?

Assume that a lottery was conducted in a small office and only 10 tickets were sold; you and a friend each bought 1 ticket. Two winners will be selected. What is the probability that your friend will...

A bakery sells two types of chocolate cakes, A and B. The production cost of cake A is $20, and of cake B — $30. The bakery sells cake A for $30, and cake B — for $42. Every day, the bakery...

Consider 3 trials, each having the same probability of success. Let X denote the total number of successes in these trials. If E[X} = 0.6, find each of the following. (a) The largest possible...

How many different(distinct) 13 digit passwords can be created using letters and digits with repetition?

i need a help with my question for homework . i need help because the professor went a quit fast in the online class. he doesn't provide good example. If anyone wanna explain it to me to how to do...

A coin that flips 3 times and gets 2 heads

Let X and Y be stochastic variables. Assume Var(X)=1.74 and Cov(X,Y)=0.79 What is Cov(4X,4X+2Y). Have tried to use the formulas for Var and Cov to get around this problem, but haven't...

Need to show my working.. been stuck on this question for my homework for a while now. Answer as a decimal or fraction.

Someone please help me with this question!!( Need it before tomorrow morning) X and Y are two random variables such that P(X = 0 n Y = a) = P(X = 0 n Y = -a) = P(X = a n Y = 0) = P(X = -a n Y = 0)...

The staff car park at the hospital has 330 spaces, and parking is restricted to permit holders. Data collected earlier indicate that only 85% of the permit holders will be at the hospital on a given...

Clarice has 7 new CDs; 3 are classical music and the rest are pop music. If she randomly grabs 3 CDs to listen to in the car on her way to school, what is the probability that she will select only...

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