Statistics formula

Suppose that we have  15 marbles in a jar. 7 of them are green, 2 of them are blue, and the rest are red. 1)What is the probability that the first marble we draw is blue?2)Suppose you drew a blue... more

A login password consists of four characters. The characters may be chosen from letters of the alphabet, numbers, or out of six special characters (#, %, _ , ! ,@ ,or *). The first character may... more

74 566 681 852 1173 1262 1552 1645 1762 1846 1860 1946 2038 20y=31.934+(-0.304)x An ecologist uses the line, based on 13 colonies, to predict how many new birds will join another colony, to which... more

Find the z score such that the area under the standard normal curve to the left is 0.66

A random sample of 49 observations is taken from a normal population with a variance of 100. The sample mean is 25 . Find the unbiased estimate of the population mean

I have derived a formula and I wonder what formula is similar to this one in a mathematical point of view?   F = (X2 - Y2)/ (X - Y )2   Is there any formula that looks like this one and is used... more

Readings on a thermometer are normally distributed with a mean of 0C and a standard deviation of 1.00.What is the probability that a randomly selectedthermometer reads: • Less than 0.53.• Greater... more