Which statement is true about the data point 84?
The graph shows a distribution of data with a standard
deviation of 6.
It is within 1 standard deviation of the mean.
It is within 2 standard deviations of the mean.
It is exactly 3 standard deviations from the mean.
It is exactly 4 standard deviations from the mean.
60
63
66
69
72 75
78
81
84
87
90 x
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Simplify (2^5/3^2)^4 a. 2^20/3^8 b. 2^9/3^8 c. 8^5/12^2 d. 2/3^2

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?

Stefanie is painting her bedroom. she can paint 2 1/3 square feet in 4/5 of an hour. how many square feet can she paint in one hour?