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Heights of men on a baseball team bell-shaped distribution wit ha mean of 183 cm and a standard deviation of 6 cm. Using the empirical rule, what is the approximate percentage of men between the following values?
a. 165 cm and 201 cm
b. 171 cm and 195 cm
A chance sample of 50 families revealed an average or median of $112,000 and a standard deviation of $40,000. What is the standard error of the average or median?
You only worry if there is at least a 50 or more percent chance that you have the disease. Suppose that test has same specificity = p For what value of p will you start to worry?
Assume that a study of 500 randomly selected school bus routes showed that 480 arrived on time. Is it "significant" for a school bus to arrive late?
Evidence that average family income in a community
Let X be the random variable which denotes the number of saves that are made by the lacrosse goalie. Find the expected value and standard deviation of the random variable.
We are interested in a 95% confidence interval for the population mean score. The margin of error associated with the confidence interval is?
One set represents the weight before treatment. The other set represents the weight after treatment. In a case like this use a paired-sample t-test.
If 60 percent of those people chewing the gum are successful in stopping smoking, what is the probability that in a group of four smokers using the gum at least one quits smoking?
What are the advantages and disadvantages of the surveying methods you did not used and what type of score did you use why?
What is the probability that a randomly selected big-screen television purchase in this sample is a purchase of a plasma-screen television?
a patient receiving a yearly physical examination and must have 16 checks or tests performed. the sequence in which the
A bus company claims that the mean waiting time for a bus during rush hour in less than 7 minutes. A random sample of 20 waiting times has a mean of 5.2 minutes with a standard deviation of 2.1 minutes.
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