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Stockbroker has kept a daily record of the value of a particular stock over the years and finds that prices of the stock form a normal distribution with a mean of $8.52 with a standard deviation of 2.38. What percentage of the scores lie below $7.42?
A professional basketball player ins averaging 21 points per game. he will be retiring at the end of this season. The team has multiple options to replace him.
Using the following data, test the question that an equal number of Democrats, Republicans, and Independents voted during the most recent election.
In study of a clinical for an allergy drug 115 of the 204 subjects reported experiencing important relief from their symptoms.
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
The drug Ancrod was tested in a double-blind clinical trial in which subjects who had strokes were randomly assigned to get either Ancrod or a placebo.
One of the questions asked on the survey to purchasing agents is: Do you think the economy is expanding? Last month, of the 300 responses 160 answered yes to the question.
Components shipped include 0.5% defectives. You plan to select 80 items; if 0 are defective, you will assume all are okay.
A recent study was designed to compare smoking habits of young women with those of young men. A random sample of 150 women revealed that 45 of them smoked.
What do we mean by confidence intervals - provide an example that illustrates your answer. Suppose we were to apply 95% and 99% confidence to your study results.. how might your result differ and why?
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
Income Trevor is interested in purchasing the local hardware/sporting goods store in the small town of Dove Creek, Montana.
What is the relationship between the variance and the standard deviation?
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