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Ask the math majors
Suppose that you ask all math majors in their fourth year whether or not they think that including statistics in the core curriculum is a good idea. Is this a good way to take a sample? Explain why or why not.
Determine the strength of the linear relationship between temperature and ice cream consumption by using correlation.
Suppose the exogeneity assumption holds. Can you use the data to show that a response schedule is false? Usually? Sometimes? Hardly ever? Explain briefly.
A business finds the average cost required to complete a project is $416 with a standard deviation of $57. A sample of 36 project cost reports was selected at random.
If this information is based on two independent random samples of 200 viewers each, test for equality of proportions using α = 0.05.
suppose that the random variable x represents the length of a punched part in centimeters. let y be the length of the
ten measurements of flow through a pipe are taken over time using a flow meter with a digital output. the flow meter
suppose we have five independent groups or samples each of size 9. how many degrees of freedom do we have for the
What is the probability of completing the exam in one hour or less (to 4 decimals)? What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes.
giving a test to a group of students the grades and gender are summarized
It's believed that 4% of children have a gene that may be linked to juvenile diabetes. Researchers hoping to track 20 of these children for several years test 732 newborns for the presence of this gene. What's the probability that they find enough..
What then is the probability that a shaft will be acceptable? Suppose that the diameter of the shaft is a random variable that is Normally distributed.
Found the sample mean to be 7.8 with a standard deviation of 1.8. Can you infer that in fact students watch less than 7 hours per week?
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