Today 9:12 PM
Choose ALL that have a POSITIVE answer.
a. (-9)(-8)(-7)(6)(5)-4)
b.
3
c
3/8+(-1/3)
d.
-1.25(-6)
e.
-3.48X(-0.3)x1.9
f.
(-1.1)(-3.5)(-2)=(-7)
8
Ob
Оe
Ос
Od
Oa

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?