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A friend of yours claims to have the psychic gift. You are skeptical of her claim. To test her gift, you take the ace of hearts, ace of spades, ace of diamonds, and ace of clubs from a deck of cards. You randomly choose one of the four cards removed from the deck and ask your friend (without seeing the card) to tell you what it is. You replace the card and repeat the experiment four times.
If your friend is really not a psychic (and is merely guessing at the cards), what is the probability that she guesses all four cards correctly? Round your answer to four decimal places.
a population of 200 voters contains 78 republicans 120 democrats and 2 independents and members of other parties. a
Motor vehicles sold to individuals are classi?ed as either cars or light trucks (including SUVs) and as either domestic or imported. In a recent year, 69% of vehicles sold were light trucks, 78% were domestic, and 55% were domestic light trucks. L..
dave drives to work each morning at about the same time. his commute time is normally distributed with a mean of 35
Assume that the population proportions are to be estimated from the samples described. Find the margin of error and the 95% confidence interval.
master card and other credit card issuers must by law print the annual percentage rate apr on their monthly statements.
a clinical trial tests a methods designed to increase the probability of conceiving a girl. in the study 540 babies
The weekly average price (in dollars/foot) and total quantity sold (measured in thousands of feet) of cop per wire manufactured by the Colton Cable Co. can be viewed as the outcome of the bivariate random variable (P, QJ having the joint densi..
The athletic director of State University is interested in developing a multiple regression model that might be used to explain the variation in attendance at football games at his school. A sample of 16 games was selected from home games played d..
Wwhat are our h0 and ha ? (c) compute zobt.(d) with a= .05, what is zcrit? (E) do we have evidence of a relationship in the population? if so describe the relationship.
20 are selected without replacement for functional testing. If 20 cards are defective, what is the probability that at least 1 defective card is in the sample?
consider an x-bar chart where the x-bar statistic is normally distributed and an associated x-bar control chart exists.
Suppose a shock causes a unit damage to the machine with probability 0.1 and no damage with probability of 0.9. Successive shocks are independent. Suppose the damages are cumulative and the machine can withstand at most four units of damage. (That..
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