Mathematics, 12.01.2020 10:31, P4thing
Suppose that 20% of students at high school a and 18% of students at high school b participate on a school athletic team. independent random samples of 30 students from each school are selected and asked if they participate on a school athletic team. let ˆ p a represent the sample proportion of students at school a who participate on a school athletic team and ˆ p b represent the sample proportion of students at school b who participate on a school athletic team.
is the 10% condition met?
because is less than 10% of all students at high school a and 30 is 10% of all students at high school b.
the standard deviation of ˆ p a − ˆ p b is approximately the difference (high school a – high school b) in the that participate on a school athletic team varies by about from the true difference in proportions of
Answers: 1
Mathematics, 21.06.2019 20:00, soniah
Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?
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Mathematics, 21.06.2019 21:30, amesha62
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?
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Suppose that 20% of students at high school a and 18% of students at high school b participate on a...
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