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In china, the probability of a baby being a boy is 0.5845. Couples are allowed to have only one child. If relatives give birth to five babies, what is the probability that there is at least one girl? Can that system continue to work indefinitely
Suppose we measured all the heights in centimeters, instead. There are 2.54 cm/inch? Question: What will happen to the covariance?
In a recent year, 11th grade New York public school students taking an English test produced test scores that were normally distributed with a mean of 81 and a standard deviation of 6. Let x be a random variable that represents a test score.
let xsub1 and xsub2 constitute a random sample from a normal population with variance 1. if the null hypothesismumusub0
The resistances of carbon resistors of 1500 ohm nominal value are normally distributed with µ = 1500 and standard deviation = 200. What proportion of resistors is expected to have resistance greater than 1150 ohm?
Use the normal approximation to find the probability that the student scores 70% or lower on a 100-question test.
1. ross whites machine shop uses 2500 brackets during the course of the year and this usage is relatively constant
A year after graduation. Find the probability that 8 randomly selected graduates all find jobs in their chosen field within a year of graduating.
The shell thicknesses of the eggs produced by a large flock of hens follow approximately a normal distribution with mean equal to 0.38 mm and standard deviation equal to 0.03 mm. Find the 95th percentile of the thickness distribution.
a recent survey asked adults about their beliefs about premarital sex and whether they thought birth control should be
the mean salary for the clearing department at ameriprise financial is 42000.00 with a standard deviation of 8000.00.
A random sample of 85 group leaders, supervisors, and similar personnel at General Motors revealed that, on the average, they spent 6.5 years on the job before being promoted.
I am conducting a ring test where 6 laboratories were asked to measure protein levels in the same flour sample. I then calculated the z score for each of their results
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