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Suppose a shipment of 50 cell phones has arrived from your supplier, The Samsing Manufacturer. As the engineer for your company you are concerned that there may be defective cell phones in the shipment. In the past Samsing has sent shipments with 12% defective cell phones. You are ok with that and you are willing to assume a = 6 defective cell phones in the shipment. Your contract with Samsing is such that you can take a sample of 5 cell phones and examine each for being defective. The agreement is that every sample of 5 from the 50 must be equally likely to be the selected sample. Let X be the number of defective cell phones in the sample of 5. a) What is Sx b) How many samples of 5 from the 50 are there? c) What is P(X=0)? d) What is P(X=1)? e) What is E(X)?
the proportion of male births to female births is 5149. in families with 6 offsprings what is the expected frequency of
For the most recent year available, the mean annual cost to attend a private university in the United States was $20,182. Assume the distribution of annual costs follows the normal probability distribution and the standard deviation is $4,400.
Explain the main differences among integers, rational numbers, real numbers, and irrational numbers. How are these used in everyday life? How would you explain the use of each to someone who did not know about the differences?
What is the correlation, and why is it so high? Since all of the guessed weights were higher than the actual weights, does that influence the correlation at all?
Compute the mean and variance of the discrete probability distribution and determine the probabilities of the following events using the binomial formula.
a confidence interval with a 95 confidence level for the proportion of voters who are in favor of the proposition in a
a recent survey asked adults about their beliefs about premarital sex and whether they thought birth control should be
in a poll of 600 randomly selected subjects 240 answered yes when asked if they planned to vote in a state election.
a system used to read electric meters automatically requires the use of a 128-bit computer message. occasionally random
a tour operator believes that the model px 40x - .25x2 can be used to predict his profit px for selling x tickets.
a sample of n 16 scores has a mean of m 65 and an estimated standard error of 2 points. what is the sample
High principal has decided to give an award to any student who scores in the top 10% of statewide scores. How high should a student score be to win this award? Give your answer to the nearest integer.
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