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It is desired to estimate the mean time of continuous use until a wireless router will first required service. If it can be assumed that the standard deviation is 60 days, how large a sample is needed so that one will be able to assert with 95% confidence that the sample mean is off by at most 10 days?
What assumptions must you make in order to use these statistics for inference? Explain in context what this confidence interval means.
out of 10 trials a receiver got four cards correct. what is her success rate? what is her expected rate of success
An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary ..
the average size of a home in 2003 was 2313 square feet according to the national association of home builders and
A random sample of 80 observations from a normally distributed population produced a mean x(bar over the x)= 22.6 . Find a 95% confidence interval for the population mean m if the population standard deviation
Using probability: How can you use probability to improve your chances of winning at a casino. Provide specific examples using concepts learned in this module
The mean SAT verbal score is 412, with a standard deviation of 90. Use the Empirical Rule to determine what percent of the scores lie between 412 and 592.
you are standing in line at the super market when a scientist standing behind you strikes up a conversation with you.
1. identify the sampling technique used to obtain this sample a person throws a phone book into the air five times
A company has 25 cars of this model in its fleet. What is the level L such that the probability that the average NOX level for the fleet is greater than L is only 0.01?
The condition for the question is that the deck of cards has 52 cards and among them are 12 face cards. What is the probability of choosing 6 face cards out of 8 chosen. Thru Binomial distribution holds( meaning with replacement)
Determine if your survey questions are appropriate for researching your business problem, and explain why they are. Identify the level of measurement being used for each of your survey questions.
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