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Question: If you have a choice between two estimates, the sample mean from a sample of size 5 and a sample mean from a sample of size 10, which one would generally give a "better" estimate? Clearly state your definition of "better."
Write down the advantages and disadvantages of using computer software for decision making.
A normal distributed population has a mean of 250 pounds and a standard deviation of 10 pounds. Given n = 20, what is the probability that this sample will have a mean value between 245 and 255 pounds?
Researchers want to conduct a survey of students taking introductory statistics in the state. Explain a method for collecting each of the given types of samples:
on tuesday april 15th 2014 gallup reported that 43 of americans approve of the job barack obama is doing as president.
the u.s. post office is interested in estimating the mean weight of packages shipped using the overnight service. they
What is the probability of being able to statistically determine a true change in the market share of magnitude 5% in either direction?
A candy company claims that 92% of consumers like their candies. To test this claim, 9571 people are selected at random from those who have eaten the company's candies.
Suppose that we want to test the null hypothesis that the mean of a normal population with σ2 = 1 is μ0 against the alternative hypothesis that it is μ1, where μ1 > μ0. Find the value of K such that > K provides a critical region of size α = 0.05 fo..
Simulate the M-ary PSK system for M = 8 and M = 16. Let ERR denote the relative frequency of symbol errors in the simulated transmission in 105 symbols. For each value of M, graph ERR, as a function of the signal-to-noise power ratio (SNR) γ = E/σ2.
Service A delivers the document with probability 0.9, Service B with probability 0.9 and Service C with probability 0.8. What is the probability that at least one copy of the document will be delivered on time?
The distribution of the SAT scores in math for an incoming class of business students has a mean of 590 and standard deviation of 22. Assume that the scores are normally distributed.
researchers were interested in the relationship between age and brain activity. they collected data on 20 subjects
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