According to a recent survey 60% of households have personal computers. If a random sample of 180 households is selected, what is the probability that fewer than 100 have a personal computer. Approximate Binomial by Normal distribution
According to a recent survey 60% of households have personal computers. If a random sample of...
According to recent surveys, 60% of households have personal computers. If a random sample of 180 households is selected, what is the probability that more than 60 but fewer than 100 have personal computers?
According to recent surveys, 60% of households have personal computers. If a random sample of 185 households is selected, what is the probability that more than 65 but fewer than 101 have a personal computer? Roundt-value calculations to 2 decimal places and final answer to 4 decimal places. Source: New York Times Almanac. P(65<x<101)
According to a survey, 70% of households said that they have never purchased organic fruits or vegetables. Suppose that this result is true for the current population of households. A. Let x be a binomial random variable that denotes the number of households in a random sample of 10 who have never purchased organic fruits or vegetables. What are the possible values that x can assume? Integers ??? to ???. B. Find to 3 decimal places the probability that exactly...
1. According to the U.S. Department of Commerce, 30% of Arkansas households had a computer in 2002. If 285 Arkansas households are selected at random, find the following probabilities: (Please show all necessary justifications.) a.The exact probability that 70 or fewer have a computer b. The probability that 70 or fewer have a computer using the normal approximation. c. The probability that 70 or fewer have a computer using the normal approximation with the continuity correction. 2. The probability that a...
According to a recent survey of households, the poll found that 48% of the adults watching a special event on TV enjoyed the commercials more than the event itself. Consider a random sample of nine adults who watched the special event. Complete parts a through d below. 1 (3 pts) What is the probability that less than four people enjoyed the commercials more than the event? what is the probablility that exactly six or seven people enjoyed the commericals more...
According to CTIA, 25% of all U.S. households are wireless-only households (no landline). In a random sample of 20 households, what is the probability that a. Fewer than 3 are wireless-only? b. At least 12 are wireless-only? (Hint: Binomial probability function) Be Very detailed show every step and calculation!
11. Pet Ownership A recent random survey of households found that 14 out of 50 householders had a cat and 21 out of 60 householders had a dog. At a = 0.05, test the claim that fewer household owners have cats than household owners who have dogs as pets.
According to the Consumer Electronics Manufacturers Association, 10% of all U.S. households have a fax machine and 52% have a personal computer. Suppose 91% of all U.S. households having a fax machine also have a personal computer. What is the probability that a randomly selected U.S. household has a fax machine and a personal computer? What is the probability that a randomly selected U.S. household has a fax machine or a personal computer? What is the probability that a randomly...
How many computers? In a simple random sample of 185 households, the sample mean number of personal computer ls was 1.64. assume the population of the standard deviation is 0.47 a) construct a 99.9% confidence interval for the mean number of personal computers. round the answer to at least two decimal places. a 99.9% confidence interval for the mean number of personal computers is ---< mean <----- 2) In a sample of 75 clamps, the mean step to complete this...
According to a national marketing survey of American households, 60% of households surveyed had incomes greater than $25,000. The survey also found that 80% of households with income greater than $25,000 in two cars, while households with income less than $25,000 had two cars 40% of the time. What is the probability that household had income greater than $25,000 given that it had two cars? (Round to nearest percentage) A. 42 B. 75 C.25 D. 69 Reset Selection