Mathematics, 23.06.2020 10:57 treymartinez7250
Researchers surveyed college students on their social media use. The following two-way table displays data for the sample of students who responded to the survey. Approximately what percent of students in the 18-22 age group use social media? (It didn’t let me type FB)
Answers: 2
Mathematics, 21.06.2019 17:00
Which graph corresponds to the function f(x) = x2 + 4x – 1?
Answers: 1
Mathematics, 21.06.2019 19:00
Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?
Answers: 3
Mathematics, 21.06.2019 21:30
In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?
Answers: 1
Researchers surveyed college students on their social media use. The following two-way table display...
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