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Suppose a simple random sample of size ne=1000 is obtained from a population whose size is N=1500000 and whose population proportion with a specified characteristic is p=0.25.
what is the probability of x=230 or fewer individuals with the characteristic?
To evaluate a program designed to improve self esteem for elementary school girls, girls were divided into treatment and control groups. Girls in the treatment group were required to attend an after-school program, while girls in the control group..
What is the centered moving average that would correspond to Quarter 2 in 2006? If we exponentially smooth the data with the a smoothing constant of 0.1, the smoothed value for Quarter 3 in 2004 would be?
For a uniform distribution over the interval a = 1 and b = 4, draw the probability density function and determine the median, the 0.1, and the 0.9 quantiles.
Describe a situation when you compared two variables and calculated the slope of their linear regression line. For example, you may have said that packages cost $5 to ship plus $1.50 per additional item
one prominent physician claims that 70 of those with lung cancer are chain smokers. if his assertion is correcta find
A company makes toys that are either working or not working. There is an imperfect test run on the toys.
Explain/discuss, the following concepts in probability and provide examples for each:
It is found that Web surfers will lose interest in a Web page if downloading takes more than 12 seconds at 28K baud rate.
a scientist attempts to perform a difficult experiment. she is successful in about 80 of her attempts. she attempts the
The time between customer arrivals at a bank has an exponential distribution with a mean time between arrivals of three minutes.
Do these data provide sufficient evidence to indicate there is a difference in average attendance?
Please solve other questions and other parts by hand, clearly show your work to get the full mark for each question. For all decimal results, please keep three decimal places.
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