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Question 1: As part of his review for a chemistry test, a student randomly selects (without replacement) 40 out of 102 elements listed on the standard tables, and tries to guess their atomic numbers. Given that the mean of all 102 atomic numbers is 51.794, and the population standard deviation is 29.804, what is the probability that the mean of the 40 atomic numbers selected by the student will be at least 58.3? Question 2: A random sample of 250 Ontario households using natural gas heating show that the mean monthly consumption of natural gas is 107.73 cu. ft., with a standard deviation of 13.94 cu. ft. Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
A large industrial firm uses 3 local motels to provide overnight accommodations for its clients. From past experience it is known that 20%: of the clients are assigned rooms at the Ramada Inn, 50% at the Sheraton, and 30% at the Lake view Motor Lodge..
There are infinitely many primes of the form n^2 - 1. Please list at least 4 of these primes. (I hope it is just as easy as I think, but is there any work to this?)
according to the census bureau 68 of americans owned their own homes in 2003. a local real estate office wants to see
question life insurancea life insurance company sells a term insurance policy to a 21-year-old male that pays 100000
the average on an exam is 75 and the standard deviation is 17. if the instructor assigned grades based on the normal
To find out whether two categorical variables are independent, one should use the.
If the value of y is 11 thousands, find the probability that these tires will last at most 15,227 miles. You MUST write your answers with 3 decimal places.
Describe the sample distribution of p-hat, the sample proportion of college students with cell phones who send or receive text messages with their phones.
what is the probability that a salesperson selected at random will have below average sales ability and fair potential
Test at the 1% significance level whether currently all adult men spend less than 11 hours per week watching sports on tv. Calculate the p-value for this problem and conduct the test using the p-value method.
If an auditor takes a random sample of 36 accounts what is the probability that the mean balance will be less than 45?
You are the manager of a softball league in the locality in which there are 5 local teams with 10 people each. The league has been arranged for parity so that each local team has 5 good players and 5 bad players.
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