The second quartile of a data set is 4.2. which statement about the data values is true?
a. the data value 2.5 will lie delow the second quartile
b. the data value 4.7 will lie below the 2nd quartile
c. one fourth of the data values are less than or equal to 4.2 and 3/4 are above 4.2
d.1/4 of the values are less than or equal to 4.2 and 1/2 of the values are above 4.2
e. 1/4 of the values are above 4.2 and 1/2 of the values are less than or equal to 4.2

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?

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4