verizon wireless would like to estimate the proportion of households that use cell phones for their phone service without a land line. a random sample of 150 households was selected and 48 relied strictly on cell phones for their service. the 90% confidence interval for the proportion based on this sample is . round to three decimal places as needed.

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Subsidized stafford loans: a. accrue interest while the student is enrolled full-time in school. b. are paid by the government. c. are paid by your parents. d. accrue interest 10 years after graduation.

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.