10 Answered Questions for the topic Stats Probibility

A card is chosen at random from a pack of 52 playing cards. What is the probability of a King or a Queen?

Determine whether the following experiments are mutually exclusive (do they overlap) and then determine the probability of the event occurring?

Stats question

in a certain county, 45% of the registered voters are democrats, 35% are republicans, and 20% are independents. sixty percent of the democrats, 80% of the republicans, and 30% of the independents... more

A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain using the visual analog scale. As

 Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that those given a sham treatment have... more

If i Roll a 20 sided die 8 times, what are the odds I get a 19 or 20 at least once?

Building a character in d20 and im looking at stats

mean for this procedur

A survey reports that the probability a person has blue eyes is 0.10. Assume that 4 people are randomly selected at Miramar College and asked if they have blue eyes. Find the mean for this... more

How many students would you expect to wait more than 18.5 minutes?

200 senior high students were asked how long they had to wait in the cafeteria line for lunch. Their responses were found to be normally distributed, with a mean of 15 minutes and a standard... more

a five card hand is dealt from a standard deck of 52 cards. How many hands consist of exactly 3 jacks?

The answer is C(4,3)x C(48,2). My question is where does the two come from after the 48 cards

If a test has a mean of 500 and standard deviation of 100(assuming a normal distribution), with N = 1000, about how many individuals score between 300 and 700

If a test has a mean of 500 and standard deviation of 100(assuming a normal distribution), with N = 1000, about how many individuals score between 300 and 700 If a test has a mean of 500 and... more

If Test X has a mean of 50, standard deviation of 10 (assuming a normal distribution), and N= 1000, about how many individuals score between 40 and 60?

If Test X has a mean of 50, standard deviation of 10 (assuming a normal distribution), and N= 1000, about how many individuals score between 40 and 60? If Test X has a mean of 50, standard... more

What is the probability of drawing two aces, two kings, or an ace and a king?

A person removes 2 aces and a king from a deck of 52 playing cards, and draws, without replacement, two more cards from the deck. Find the probability that the person will draw two aces, two kings,... more

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