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A hypertension trial is mounted and 12 participants are randomly assigned to receive either a new treatment or a placebo. Each participant takes the assigned medication and their systolic blood pressure (SBP) is recorded after 6 months on the assigned treatment. The data is shown on the table. Is there a difference in mean SBP between treatments? Run the appropriate test at α= 0.05
Placebo New Treatment
134 114143 117148 121142 124150 122160 128
Explain the importance of random sampling. What problems/limitations could prevent a truly random sampling and how can they be prevented?
What do you think would happen to reaction rate in the tube incubated in ice if this tube, with enzyme and substrate already mixed, were placed in the 37 degrees C water bath?
Suppose, for the moment, which neither store pays sales commissions. Parkleigh offers an hourly wage plus the employee discount. Kaufmann's offers only an hourly wage. Do you expect Kaufmann's hourly wage to be higher or lower than Parkleigh's.
In 2005 she paid $10,000 to add a room to the house. In 2007 she paid $625 to have the house painted and $800 for built-in bookshelves. As of January 1 of the current year, she has reduced the $48,000 mortgage to $44,300. What is her basis for the..
Conclusion must bring together all ideas about aliens you have developed in paper and explain possible significance of "alien" as element of science fiction.
A small manufacturer was once quoted as saying, "The best day also the worst day of my business life was the day we got a contract from Wal-Mart." Illustrate what type of vertical supply chain/distributer; ion channel is the manufacturer entering?..
Draw a diagram that represents the molecular structure of a phospholipid. Be sure to show any part of the molecule that might be charged. Describe 2 ways in which the molecular structures of phospholipids and triglycerides are similar, and two ways ..
Times of crisis can present opportunities for informal leadership to emerge. Those who take charge of threatening situations often have no formal title or position.
Suppose that you perform a significance test regarding a population mean and that the evidence does not warrant rejection of the null hypothesis.
When managers who were responsible for the decision to launch the Challenger space shuttle were attempting to balance the conflicting demands for ensuring the safety of the astronauts with the desire to obtain future funding for the US space progr..
Standard deviation of 7. At 0.01 significance level, is there more variation in first population?
What is the probability of selecting a female or an accounting major? Which rule of addition did you apply?
What is the level of measurement for these items related to the newspaper business?
What percentage of population scored between the mean and Jorge?
How many of these new cardholders would you expect to default? What is the standard deviation?
In the last quarter of 2007 a group of 64 mutual funds had a mean return of 0.9% with a standard deviation of 5.2%. Consider the normal model N(0.009.052) for the returns of these mutual funds.
Find the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
When the non-parametric statistics utilized? Write down an example.
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
Test hypothesis that mean weight of 2 sheets are equal against alternative that they are not(suppose equal variances). Use α=0.05 and suppose equal variances. Determine the P value.
According to the regional bar assoc., 60% of people who take the bar exam pass. Find the approximate probability that at least 61% of 200 randomly selected people taking the bar will pass. Round to three decimal places as needed.
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