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Suppose that medical researchers want to estimate the true proportion of all teenagers with high blood pressure whose blood pressure would decrease if they took calcium supplements. To test this, they plan a clinical trial in which n = 120 teenagers with high blood pressure will be given calcium supplements. Suppose the clinical trial is completed, and 80 of the 120 participants experienced a decrease in blood pressure.
What is the value of the sample proportion (also called the point estimate) for this sample? Using the result found in part a, determine the value of the standard error of . Note that in many situations we will not know the true parameter, p, and thus will substitute our sample proportion for p in the calculation of the SE. This formula then for the SE() when p is unknown is:
in the last decade society in general and the judicial system in particular have altered their opinions on the
In a supermarket 20% shoplifters usually get caught, if a random sample of 8 shoplifters is selected. Find the mean and variance of the distribution. What is the probability that 3 will get caught?
For the period from 1918 to the present, in a random sample of 13 wolves spotted in the region, what is the probability that 10 or more were male? What is the probability that 10 or more were female?
find the test statistic f to test the claim that the populations have the same mean.brand 1brand 2brand
At the .05 significance level, can Macaray conclude that the population means are different? Note that you should show all 5 steps in the test of hypothesis.
lay out the design for two between-subjects experiments a an experiment involving an experimental group and a control
Make an argument about the effects of nation-building - both in the Andersonian sense of "imagining" a national community and in the Weberian sense of modernization and integration - on European history during the long 19th century.
roger and harry play the following game each of them rolls a fair die. their rolls are independent. roger wins if the
suppose that a pharmaceutical company wants to claim that side effects will be experienced by fewer than 20 of the
There are three versions of a board game released - version 1, version 2, and version 3. The versions are distributed equally and evenly among all potential sellers of board games.
The variable Z has a standard Normal distribution. Find the number z that has cumulative proportion 0.85.
according to a survey of 25000 households conducted by nielson company 51 of the people watching the 2010 super bowl
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