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Surveys repeatedly show that about 40% of adults in the U.S. indicate that if they only had one child, they would prefer it to be a boy. Suppose we take a random sample of 25 adults. (For this problem it is best to use the Binomial Tables). Based on a proportion of .40, what is the probability that exactly 8 adults will prefer a boy? P(x=8)
In an air-pollution study performed at an experiment station, the following amount of suspended benzene-soluble. Assuming that the population sampled is normal, construct 95% confidence interval for the corresponding true mean.
Analyze the Regression and draw the scatter plot for results of the Hsp90 affinity and Her-2 degradation studies.
Simple random sample of 100 elements is taken: (a) What is the chance of an element being included in the sample? (b) What is this chance called (hint: not probability)?
Simulate 50 observations from a normal distribution with mean 0 and standard deviation 1. make a normal plot.
1. an srs of size 10 is drawn from a population that has a normal distribution. the sample has a mean of 111 and a
the following is an appropriate statement of the null and alternate hypotheses for a test of a population meanh0 ?
if a gambler rolls two dice and gets a sum of 9 he wins 12 and if he gets a sum of four he wins 20. the cost to play
They estimated the proportion of students at the university who prefer outdoor exercise as (0.5745, 0.8217), with 95% confidence. Which of the following is an appropriate interpretation of this confidence interval?
The number using each entrance is reported below. At the .01 significance level, is there a difference in the use of the four entrances?
A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients.
find the approximate value of z that gives an area of 0.025 to the right of it. round your answer to the nearest
the data set toxemia contains information for a sample of 100 infants born in two hospitals in boston. indicators of a
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