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According to the Polk Company, a survey of households using the Internet in buying or leasing cars reported that 81% were seeking information about prices. In addition, 44% were seeking information about products offered. Suppose 75 randomly selected households who are using the Internet in buying or leasing cars are contacted.
(a) What is the expected number of households who are seeking price information?
(b) What is the expected number of households who are seeking information about products offered?
(c) What is the probability that 67 or more households are seeking information about prices?
(d) What is the probability that fewer than 23 households are seeking information about products offered?
Several years? ago, 47?% of parents who had children in grades? K-12 were satisfied with the quality of education the students receive.
Represent the data relating to the average travel times in a histogram and represent the data relating to the percentage of workers using public transportation in a stem and leaf plot.
Decide whether the experiment is binomial, poisson, or neither based on the information given. you observe the gender of the next 950 babies born at a local hospital.
Explain the difference of your outlook on statistics after having studied it for whatever period of time you have done so as oppose to the time before taking up the study.
What is the probability that the first time the sum is exactly 7 is on the third roll?
a sample has a mean of m25. if one person with a score of x25 is added to the sample what effect will it have on the
two diseases a and b are spread in a certain population. it is known that 10 of the persons in this population will
Suppose that a calculus student is randomly selected to accompany the math teachers to a conference. What is the probability that the student is a junior?
Forty percent of business travelers carry either a cell phone or a laptop. In a sample of 15 business travelers, what is the probability that:
Some people claim that the physical demands on dancers are such that dancers tend to be shorter than the typical person in the population.
Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
Find the parameters of the distributions obtained in a) and b) in terms of the parameters of the joint distribution of V and W.
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