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According to the school board 48% of all the voters in the district support the refeendum. Suppose a principal is interested in the proportion who supported the referendum in a group of 38 parents.
What is the probability that the portion of the group who support the referendum is at least two thirds?
What is the probabilty that the proportion of the group who support the refendum is no more than 30%?
There is some concern that exposure to gases used in anesthesiology might be harming health of anesthesiologists. In one study of 525 Michigan nurse anesthesiologists, 10 reported a new malignancy other than skin cancer during the previous year.
Composite sampling is a way to reduce laboratory testing costs. A public health department is testing for possible fecal contamination in public swimming pools
Assert with probability of at least 0.95 that the error of her estimate will not exceed 0.07. How large a sample, n, will she require if she has no idea what the true proportion is.
Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 69 and 89?
The mean heart rate is 90 beats per minute with a standard deviation of 5. Find the 98% confidence interval for the true mean heart rate of all people with this untreated condition.
Use the graph of f(x)= x^ to match the function to its corresponding graph. In words describe the transformation that occurs (ex: The graph of f(x) is shifted 6 units to the left).
the number of ratios in each household in a country. is this a population or sample?the ages of three families of
assume that a random sample is used to estimate a population proportion p. find the margin of error e that corresponds
Is there sufficient evidence to conclude that a majority of U.S. adults feel this way? Test the appropriate hypotheses using a 0.01 significance level.
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Suppose the mean cannot be adjusted but the standard deviation can be reduced. What maximum value of the standard deviation would make 90% of the parts acceptable to the consumer? (Assume the mean to be 1.012)
find the max likelihood estimates for theta1 u and theta2 gamma2 if a random sample of size 15 from nu gamma2 yileded
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