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The value of y(i) for each of the N=8 units in the whole population. The index set for the population is:
u = {1,2,3,4,5,6,7,8}
The values of y(i) are
i ; 1 2 3 4 5 6 7 8y(i); 1 2 4 4 7 7 7 8
For the population noted above, find the sampling distribution of bar(y) for
a. an SRS of size 3 (without replacement)
b. an SRSWR of size 3 (with replacement).
For each, draw the histogram of the sampling distribution of bar(y). Which sampling distribution has the smaller variance, and why?
At 0.01 level of significance, is there evidence that mean price is higher at Whole Foods Market than at Fairyway supermarket? Interpret the meaning of p-value in (i).
In a large western university, 15% of the students are graduate students. If a random sample of 20 students is selected, what is the probability that the sample contains:
Find out a linear equation in the form P = mt + b (y = mx + b) that gives the population, P, t years from 2010.
A manufacturing process produces items whose weights are basically distributed. It is known that 22.57% of all the items produced, weigh between 100 grams up to the mean and 49.18% weigh from the mean up to 190 grams.
Assuming that the first digit cannot be a zero, compute the number of possible outcomes when the digits can be repeated.
Compute an F-statistic for each linear construct and determine its significance. Also, state what questions each of these contrasts address.
An urn contains 8 balls identical in every respect except color. There are 4 blue balls, 3 red balls, and 1 white ball.
The article claims that the distributions of annual returns for both common stocks and long-term government bonds are bell-shaped and approximately symmetric. Assume that these distributions are distributed as normal random variables with the mea..
A particular medical operation proves fatal in 1% of the cases. Find an approximation to the probability that there will be at least 2 fatalities in 200 operations.
Construct a 99% confidence interval for the proportion of customers favoring underground installation.
Construct a 99% confidence interval for the average length of usage time to recharge.
A recent article suggested that if you earn $25,000 a year today and the inflation rate continues at 3 percent per year, you'll need to make $33,598 in 10 years to have the same buying power. You would need to make $44,771 if the inflation rate ju..
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