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A teacher wants to estimate the average pa of all teachers in a district. She wants to be 95% sure her estimate is correct. The standard deviation is $1,000, how large must her sample be to be accurate within $200?
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A recent article in the Denver Post indicated that the mean selling price of the homes in the area is more than $220,000. Can we conclude that the mean selling price in the Denver area is more than $220,000? Use the .01 significance level. What is..
Categorize as simple, random, sample, stratified/systematic sample, cluster/convenience sample. List discharged hotel customers, divide them day their length of stay, and draw simple random samples from each group.
The management of White companies considering a new method of assembling its golf cart. Compute which assembly time using the new method is faster.
The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200. Nancy Bright's SAT score was 1390. What percentage of students have scores more than Nancy Bright?
(a) If F is the exponential distribution with rate λ, which, if any, of the processes {Xn}, {Yn} is a Markov chain? (b) If G is the exponential distribution with rate μ, which, if any, of the processes {Xn}, {Yn} is a Markov chain? (c) Give the trans..
convert the following sat scores into new distributions with a mean of 50 and a standard deviation of 2.what new score
suppose the national transportation safety board ntsb wants to examine the safety of compact cars midsize cars and
What is the difference between the author's pulse rate and the mean? How many standard deviations is that [the difference found in part (a)]?
Normal distribution has mean of 80 and standard deviation of 14. Find out the value above which 80 percent of values will occur.
Compute the population mean, the population median, the population midrange, the population range, the population variance, the population standard deviation, and the population proportion of odd numbers. Verify the following results:
Find the value of k that makes this function a probability density function. Find P(Y1 ≥ 3Y2). That is, find the probability that the cleaning device reduces the amount of pollutant by one-third or more.
a production process produces 90 non-defective parts. a sample of 10 parts from the production process is selected.a.
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