Ed Two trains are traveling at constant speeds on different tracks.
0
12.5
100
s do...
Train A:
Distance traveled (meters) Elapsed time (seconds)
0
1
I
100
Train B:
Distance traveled (meters)
4 +
+
Elapsed time (seconds) +
0
Which train is traveling faster? Explain your reasoning.
I
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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?