Form of an equation
A factory produces 1,400 beams a day, which are on average 2.5% defective. Find the probability out of 70 beams inspected at random, that exactly 2 will be defective. Leave your answer in the form of an equation, do not solve it.
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What is the expectation of the random variable W = X+Y+4. What is the variance of the random variable W?
The lifespan of an electrical component is assumed to be normally distributed with an average life of 6 years and a standard deviation of 1 year. The electrical component manufacturer wants to offer their customers a product-replacement guarantee,
Bob, a manufacturing plant manager, is inspecting the diameters of ball bearings produced by a suspected malfunctioning unit. He randomly selects a sample of 12 ball bearings and measures the diameters, which are as follows (in millimeters):
Based on these data, the company can conclude that there is a statistical difference between men and women with regard to mean spending at the hardware store with men tending to spend more on average than women.
A study was recently conducted at a major university to determine whether there is a difference in the proportion of business school graduates who go on to graduate school within five years after graduation and the proportion of non-business schoo
Each statement identifies a dependent variable and one independent variable that might be used in a simple linear regression model to predict the dependent variable.
What is the probability of having a length of gestation less than or equal to 36 weeks given that an infant is low birth weight? This is from Fundamental of Biostatistics 7th Edition. Problem 3.50 on page 62. Textbook says it should be 0.541, but
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