Nearest integer and then summed
75 numbers are rounded off to the nearest integer and then summed. If the individual round-off error are uniformly distributed over (-.5, .5) what is the probability that the resultant sum differs from the exact sum by more than 5?
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Random samples for both airlines after a storm showed that 51 out of 200 flights for Airline A were delayed, while 60 out of 200 of Airline B's flights were delayed. What is the standard error for this hypothesis test?
For a small sample difference of means test where n1 = 20 and n2 = 20, and we can assume the population variances are equal, the degrees of freedom for the test statistic is:
Suppose that from the past experience a professor knows that the test score of a student taking his final examination is a random variable with mean 68 and standard deviation 9.5.
If the test statistic for a difference of means test has a p-value of .03, we could reject the Null Hypothesis at an alpha level of .01.
A skeptical paranormal researcher claims that the porportion of Americans that have seen a UFO, p, is less than 4 in every ten thousand. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is failure to reject t
You just recently read somewhere that the mean elevation drop for ski trails at eastern ski centers is at least 450 feet. You believe that the elevation is lower than 450 feet. Write the null and alternative hypotheses that would be used to test t
A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types. The magazine takes a random sample of pens of each type and the lifetimes are reported in the following table. Analyze using alpha=.01. Need a walkthrou
In a study, the data you collect is status of disease infection. In a study, the data you collect is favorite type of food.
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While providing teaching to a patient regarding health complications in women associated with sexually transmitted diseases (STDs),
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Question: Taking oral contraceptives has the greatest risk to someone's health if the individual Answers:
Comment on the key characteristics of the evidence that would be appropriate for the population identified in your public health problem.
The nurse is examining a patient who may have oral cancer. Which sign below makes the nurse believe this patient may have oral cancer?