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What is the difference between systematic random sampling and stratified random sampling..
How do you combine them..
If a question is asked a stratified sample of 10 cities are used...use a systematic sampling technique to find the missing data.
For 2000 patients,blood-clotting time was normally distributed with a mean of 8 seconds and a standard deviation of 3 seconds.what percent was blood-clotting times between 5 and 11 seconds?
Assume 41% of all American adults have some college education. American adult is randomly selected. Determine the probability that adult owns stock or has some college education?
There are 2,000 eligible voters in a precinct. A total of 500 voters are randomly selected and asked whether they plan to vote for the Democratic incumbent or the Republican challenger. Of the 500 surveyed, 350 said they would vote for the Democra..
a researcher believe that college students spend a different amount of time talking on the phone than they do instant
Write a brief research report based on an analysis of the data file - describe the demographic characteristics of my sample and how the data were collected
1.researchers compared two groups of competitive rowers a group of skilled rowers and a group of novices. the
The average height of flowering cherry trees in a nursery is 11 feet. If the heights are normally distributed with a standard deviation of 1.6, find the probability that a randomly selected cherry tree in this nursery is less than 13 feet tall.
Determine kas a function of µ such that ƒ is the probability density function of a random variable X. What is the distribution function of X?3- If we define Y=X-λ/µ. What is the distribution of Y?
Use the range to calculate the standard deviation
For these data, a 99% confidence interval for the true mean weigh loss by patients attending clinic would have limits (? , ?).
for a given wind turbine the probabilities of failure to component a b and c follow the rule 325. the respective
The percentage of "white area" in a sample of a dark product is used to evalu ate how well a white raw material has been mixed into the product. Using the data from whitearea .txt, which contains samples from two different mixing processes, do th..
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