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A geologist has collected 10 specimen of balastic rock and 10 specimens of granite. The geologist instructs a labatory assisstant to randomly select 15 of specimen for analysis.
a. What is the number of granite specimen selected for analysis?
b. What is probability that all specimen of one of the two types of rock are selected for analysis?
c. What is the probability that the number of granite selected for analysis is within 1 standard deviation of it means value.
Compute the correlation among the variables. Describe perfect correlation also negative correlation. Utilize the following data to answer questions related.
In a random sample of 35 trading days, the volume of a particular stock is recorded to determine whether the mean volume of the stock changed from its 2007 value of 35.14 million shares.
Crystal Ball requires the following steps:
A manufacturer wishes to estimate the proportion of washing machines leaving the factory that is defective. How large a sample should she check in order to be 93 percent confident that the true proportion is estimated to within 0.014?
In order to compare the means of two populations, independent random samples of 484 observations are selected from each population, with the following results:
A local bank wants to install motion detector burglar alarms. Each has a 70% chance of detecting a burglar. If the bank wants to be 99% certain of detecting a burglar how many need to be installed?
Woodco manufactures tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pine. A total of 150 board feet of oak and 210 board feet of pine are available.
Is there evidence of a significant difference in the proportion who get their news primarily from newspapers between those 36 to 50 years old and those above 50 years old? (use α = 0.05)
One of the most famous probability calculations is called the "birthday problem". In probability theory, the birthday problem or birthday paradox concerns the probability that, in a set of n randomly chosen people
Then describe trade-offs which will happen when you lower sample to $10,000 to meet their budget.
To test the given claim using Single Proportion Z test.
Given 7 male individuals in a Physical Education course, the number of sit ups each individual can do in a one minute period was recorded:
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