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A gambler has a fair coin (with one head and one tail) and a two-headed coin. He selects one of the coins at random, and when he flips it, it shows heads. Suppose that he flips the same coin a second time and again it shows heads. Then he flips the coin 2 more times. What is the expected number of heads across all 4 flips and the variance of the number of heads across all 4 flips?
The airline must sell 150 seats to break even on this particular flight. On what percent of the flights does the airline make money?
two competing lighting systems are installed in two adjacent parking lots with system a being significantly less costly
According to recent surveys, 58% of households have a personal computers. If a random sample of 159 is selected, what is the probability that more than 81 but fewer than 105 have a personal computer?
Steve Goodman, production foreman for the Florida Gold Fruit Company, estimates that the average sale of oranges is 4,700 and the standard deviation is 500 oranges. Sales follow a normal distribution.
a certain drug causes kidney damage in 1 of the patients. suppose that the drug is to be tested on n patients and let e
a researcher wishes to estimate with 95 confidence the proportion of adults who have high speed internet access. her
Which of the following can be treated as binomial experiment? (a) Surveying 1200 registered voters to determine their preferences for the next president?
Interpret the estimated coefficient for the toxemia variable and what are the odds of a hemorrhage for infants whose mother had toxemia?
consider the following. give your answers correct to two decimal places.a determine the value of the confidence
in a sample of 1000 voters 520 plan to vote for candidate a. find the 95 confidence interval for the percent in favor
Suppose no calls are currently being processed (either on hold or in progress), what is the probability that the Helpdesk will receive the next call within the next 10 minutes?
Is is possible to modify a semantic differential scale into a 10-point scale? If so, should the data be treated as ordinal or interval?
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