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Many people believe that unusual behavior is more likely to occur during a full moon. In fact, they believe that twice as many events happen during the full moon as during the other phases. As a test for empirical evidence to support this belief, suppose that you categorized the visits of new clients to a community health unit over a one-year period by lunar phases and found the following distribution of visits:
Full Moon: 82
New Moon 50
First quarter 40
Third quarter 48
Do new visits vary with the phase of the moon?
Do the appropriate statistical test and write a statement of results.
it is estimated that 56 of the children between the ages of 3 and 5 years are already enrolled in school. in a sample
Girls are needed to ensure that a 95% confidence interval estimate for the differncein mean BMI between boys and girls has a margin of error not exceeding 2 units?
Prof Hardtack gave three exams last semester in a large lecture class. The standard deviation = 7 was the same on all three exams, and scores were normally distributed.
SAT verbal scores are normally distributed with a mean of 423 and a standard deviation of 91. Use the Empirical Rule to determine what percent of the scores lies between 423 and 514.
You are conducting a one-tailed or two-tailed test? Explain with an example and also state the Null and the Alternative hypothesis for the example in symbolic form.
a study of various news home pages reports that the mean number of bad links per home page is 0.4. if the errors occur
A pediatrician is interested in studying the effect of Motrin on reducing temperature in young children. Four children with influenza have their temperatures taken immediately before and then 20 minutes after taking a standard dose
a chemical engineer is interested in determining whether a 1 certain trace impurity is present in a product. an
in answering a question on a multiple-choice test a student either knows the answer or guesses. let p be the
suppose your right knee is sore 15 of the time and your left knee is sore 10 of the time. what is the largest possible
The statistical assumptions required to perform a one-way ANOVA to compare the means of these three groups are reasonable based on the data. A partially completed ANOVA table is provided below?
the acceptance scheme for purchasing lots containing a large number of batteries is to test no more than 75 randomly
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