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Suppose you want to sample the music of a band you haven't heard before. You're given 5 CDs, each with 12 tracks. You'll use a probability method to sample 5 tracks to play.
a. Describe (briefly) how you would carry out a simple random sampling method to pick the 5 tracks.
b. Describe (briefly) how you would carry out a stratified sampling method to pick the 5 tracks.
c. Describe briefly how you would carry out a cluster sampling method to pick the 5 tracks.
If a student studies for 15 hours, what score should the student expect on the next. What percent of the variation in the points earned on the exam is explained by the number of hours the student studies?
Assume you choose 20 houses at random. On average, how many houses of twenty would you expect to have DVD? Determine standard deviation of number of houses with DVD?
researchrs found that a person in a particular country spen an average of 5.6 hours a day watch tv in 2010. assume the
a sample of 40 cds from a students collection showed a mean length of 52.74 minutes with a standard deviation of 13.21
there are 2r 2r is less than or equal to n gloves randomly chosen from n distinct pairs of gloves i.e. 2n gloves in
Suppose that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Let x (sample mean) be the mean life of range sample of 25 such bulbs.
A random sample of 50 households revealed a mean of $112,000 and a standard deviation of $40,000. What is the standard error of the mean?
Many people do not "like" or "trust" single point estimates for things they need measured.
Examined the effect of body position on blood pressure
Discuss some of the advantages and disadvantages of the WHO protocol versus the single test. Give the assumptions that you have made in carrying out calculations.
Use the sample results with a 0.05 significance level to test the claim that pulse rates of men have a standard deviation greater than 10 beats per minute.
For the following hypothesis test where H 0 : m £10 vs. H a : m >10, we reject H 0 at level of significance a and conclude that the true mean is greater than 10 when the true mean is really 8.
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