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A kinesiologist would like to compare the left hand and right hand gripping strengths of left-handed individuals. A scale is placed on a shelf and gripping strength will be measured by how tightly a
Suppose the probability of a customer purchasing 0, 1, 0r 2 books at a bookstore are 0.2, 0.2, and 0.6 respectively. What is the standard deviation of this customers book purchase?
Monetary Exchange Rate Statistics: The type of statistic I feel most affected by are currency exchange rates because they directly affect the cost of traveling abroad. Which, is something I like to
In a group of 15 batteries, 6 are dead. You chose 2 at random. The expected number of good batteries is 1.2. What is the standard deviation?
Find the probability that the student makes at least a "B" assuming that in order to make at least a "C" the student must score at least 70%.
Assume that Charlotte has two stocks: Disney (D) and Amazon (A). For each of these stocks, the possible percent returns are {0%, 5%, 10%, 15%}. The joint probability of P(d, a) = 0.0625 for all val
Calculate the standard socre for a randomly selected sample of 45 with x=23. Explain why the standard scores of 23 are different between a and b.
Assume that the probability increases to 70%. What is the probability that at least 12 out of 15 students will actually enroll?
A confidence interval estimate for the population mean is given to be (36,25,44,76). Determine the confidence level used for given confidence interval.
Find the mean and variance of a random variable defined to be 1 it he makes a sale and 0 otherwise.
Suppose now we have a new random variable X = 2 + 3Y. Construct a Table with the probability distribution of X for each value of Y and X.
Consider an experiment that consists of taking 1 marble from the box and then replacing it in the box drawing a 2nd marble from the box. Describe the sample space and repeat when the 2nd marble i
Find the mean, variance and standard deviation for the population of the number of persons per household.
Let f(x)= a(e^(-2x) - e^(-3x)), for x > or equal to 0, and f(x)= 0 elsewhere. Find a so that f(x) is a probability density function.
Construct a table of each value of the random variable X, the number of persons in the household, and its estimated probability or frequency.
If a random variable X has the uniform (0,1) distribution and Y=2X-1. Find P[Y≤y] for all such values y by reexpressing the inequality in terms of X. Use this to find the probability density fun
Find the standard deviation given that the probability of less than 990ml in a randomly selected bottle is 5%. What can you say about the standard deviation if the probability is less than 5%?
The random variable X is normally distributed with mean μ and variance σ(squared). Given that P(X > 58.37) = 0.02 and P(X < 40.85) = 0.01, find the mean and the standard
At the time, I believed that Brazil would beat Portugal with probability 0.8. For the bet to be fair, how much should Mahmood have paid me if Brazil did not beat Portgual?
A Random sample of size 10 is chosen from a population of 100 without replacement If A and B are two indiviuals among the 100, what is the probability that the sample will contain?
To perform a certain type of blood analysis, lab technicians must perform two procedures. The first procedure requires either one or two seperate steps, and the second procedure requires either one
Assuming that the times between repairs are exponentially distributed, what is the probability that such an appliance will work at least 3 years without repairs?
The U.S. adult population by age is as follows (The World Almanac, 2009). The data are in millions of people. Age Number 18 to 24 29.8 25 to 34 40.0 35 to 44 43.4 45 to 54 43.9 55 to 64 32.7 65 and
Assuming that all permutations of the passengers getting off at various floors are equally likely, find the probability that at least two of them get off on the same floor.
If the Maximum Error of Estimate is 0.05 for this sample, what would be the sample size? Given that the sample Size is 400 with this same z(a/2) and s, what would be the Maximum Error of Estimate?