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Jinbao produces tubas and ships them in lots of twenty. Suppose that 60% of all such lots contain no defective tubas, 30% contain one defective, and 10% contain two defectives. Now suppose that a lot is inspected, with two tubas being selected from it at random, and neither is found to be defective.
a. What is the probability that there are no defectives in that lot?
b. What is the probability that there is one defective in that lot?
Undergraduates at her college and mails a questionnaire to 250 students selected at random. Only 104 questionnaires are returned. what is the population.
The negotiation will end successfully? After 4 hours? After 8 hours? How does the precentage likelihood of a successful negotiation change over the course of time?
Past studies have revealed that only 88% of booked passengers actually arrive for flight.) Determine probability that if airline books 17 persons, not adequate seats will be available.
Comprise appropriate (BPS formatted) descriptive statistics table inferential statistics table.
a computer repair shop gets computers on regular basis for repairs. the repair time between two computers is
Since he has not attended class recently, he doesn't know any of the answers. Assuming that he guesses on all 10 questions, find the following: What is the probability that he will answer all ten questions incorrectly?
joe used a project management software package and has determined the following results for a given project. expected
70 people received a higher score on the second test, 13 a lower score, and 1 received the same score. At the 0.05 significance level, test the claim that the music has no effect on memorization skills.
A Harris poll of 1012 adults resulted in 870 who say that they always wear a seat belt in the front seat. Find the value of the test statistic z for proportion.
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated.
In the other group 40 out of 80 favored capital punishment. Calculate an appropriate test value to test the hypothesis that the population proportions are the same.
1. state two ways in which the standard normal distribution and the students t-distribution are alike.2. state two ways
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