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Deer ticks: wildlife biologists inspect 153 deer taken by hunters and find 32 of them carrying ticks that test positive for lyme disease.
a) Create a 90% confidence interval for the percentage of deer that may carry such ticks
b) If the scientists want to cut the margin of error in half, how many deer must they inspect?
c) What concerns do you have about this sample?
If probability of drawing a face card is 0.625. Determine the probability of not drawing a face card.
the mean amount spent by a family of four on food per month is 700 with a standard deviation of 85. assuming that the
Our nation's focus on crime has made a gradual shift away from drugs to what many perceive to be the major problem facing our criminal justice system today: juvenile crime,
In an experiment on a new drug to determine the most effective dosage and method of administration, subjects were randomly assigned to either 5, 10, 15, or 20 mg of the active drug.
Workers at a large toxic clean up project are concerned that their white blood cell counts may have been reduced. Let x be a random variable that represents white blood cell count per cubic millimeter of whole blood in a healthy adult.
Graph one shows a number of observations that are very spread out but generally trending from the top left of the graph to the bottom right.
Calculate a confidence level at 95% to get an interval estimate for proportion?
Measure of average you might be inclined to report and in what sense each value can be considerd typical. (A) as vice president responsible for collective burgaining.(B) as the president the employee burgaining unit.
What is the null and alternative hypothesis? What is your final conclusion?
The math SAT scores for all women are normally distributed with a mean of 496 and a standard deviation of 105.
the salinity in the ocean is expressed in parts per thousand ppt. during november 2008 the mean salinity in a region of
What is the probability that a randomly chosen package is improperly sealed?
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