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A microchip company has two machines that produce the chips. Machine I produces 55% of the chips, but 5% of its chips are defective. Machine II produces 45% of the chips and 15% of its chips are defective.
A) a chip is selected at random, find the probability that it is a defective chip.
B) A chip is selected at random and found to be defective. What is the probability that it came from machine I.
Consider the following two economic characteristics with two possible outcomes each: employment (increase, decrease) and economic trend (positive, negative).
Why do we want to assume that our sample data represent a population distribution? What are the differences between the binomial and normal distributions?
ACT math scores for 2007 were Normally distributed with mean 21.0 and standard deviation 5.1. What is Eleanor's standardized score? Round your answer to 2 decimal places.
The owner of Britten's Egg Farm wants to estimate the mean number of eggs laid per chicken. A sample of 20 chickens shows they laid an average of 22 eggs per month with a standard deviation of 2.03 eggs per month.
1. according to the yankee group 53 of all cable households rate cable companies as good or excellent in quality
Botanist is testing three plants and finds that prob of plant A being alive in a weak is 0.3 plant B is 0.6 and plant C 0.5 these probability are indipendant of each other. Determine the probability of all plants being alive after a weak.
for calculation please use precision level at least three digits after the decimal point.for hypothesis tests use
the roulette wheel has 38 compartments of which 18 are red 18 are black and two are green. as the wheel is spun a small
The company production manager feels that a standard deviation of more than three bodies a day indicates unacceptable production rate variations. Explain whether this is acceptable?
a population has a mean of 300 and a standard deviation of 24. a simple random sample of 144 observations will be
Create a research question for one of the following groups: students, children or women. Include the independent and dependent variables you would study, an explanation of whether a one or two-tail test is most appropriate
Quality Progress, Feburary 2005, reports on the results achieved by Bank of America in improving customer satisfaction and customer loyalty by listening to the "voice of the customer".
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