What was her score on the test
A national achievement test is administered annually to 3rd graders. The test has mean score of 100 and standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test?
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A woman has agreed to participate in ESP experiment. She's asked to choose, randomly two numbers between 1 and 6. The second number should be different from the first. Find out the probability that:
Let b0 and b1 be the slope and intercept from a linear model fitted to a particular data.After estimation you come to realize that X was misspecified and the true value of X is X' = 2*X +3
How do you write the exponent of normal distribution (mu, sigma) in terms of sample mean and variance for iid x1, x2, x3,....xn . That means no more summation X and summation x2.
Six marbles are randomly selected with replacement from a urn. The urn is equally likely to be urn I (which contains 1 red marble and 1 green marble) or urn II (which contains 11 red and 9 green marbles). Find the conditional probability that the
A game includes tossing a coin and rolling ordinary die. If the player tosses a head and rolls and even number, the player wins $3. Otherwise the player pays $1. Compute the expected value of this game?
A state lotter has a daily drawing to form four digit number. The digits 1 through 9 are randomly chosen for ach of the four digits. For each selection any one of the digits 1 through 9 are possible. What is the probability that the nearest hundre
A teacher upon her way to work passes by three stoplights each morning. The distances between the stop lights are great and lights operate independently of each other.
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