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Insomnia and pain. A recent study looked at the relationship between insomnia and pain among parents and adolescents. A total of 259 adolescents (69 with current insomnia) and their parents (256 middle-aged adults, 78 with insomnia) were recruited for the study. For each participant, the perceived level of overall pain was determined using an average score measured on 7 pain-related items extracted from the Somatic Symptom Inventory (SSI-28). The following table summarizes the results.
(a) For each age category, state the null and alternative hypotheses for comparing the two groups.
(b) For each age category, perform the significance test at the α = 0.05 level, making sure to report the test statistic, degrees of freedom, and P-value.
(c) Write a one-paragraph summary of your conclusions.
Dr. Stallter has been teaching basic statistics for many years. She knows that 80 percent of the students will complete the assigned problems.
It is asserted that a greater proportion of males (= x 1 ) contribute to charity than females (= x 2 ). A survey of male and female contributors to charity showed that of 900 males surveyed
Suppose a sample of 35 surveys shows a sample mean of 17 minutes. Use = 4 minutes. Is the premium rate justified? Formulate the null and alternative hypotheses for this application.
it is essential in the manufacture of machinery to utilize parts that conform to specification. in the past diameters
a survey asks 1400 chief financial officers has the economy forced you to postpone or reduce the amount of vacation you
clifford likes dogs. he wondered how much dog owners spend on their dogs in a year. he hypothesized that dog owners
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Find the probability that Mary obtains exactly one Head and so does John. [Hint: We assume that Mary's tosses are completely independent from John's.]
question a group of 2000 randomly selected adults were asked if they are in favor of or against cloning. the
Theorists maintain that the development of virtuous character requires the right sort of society and culture. What are the arguments for and against that claim?
the average math sat score for males was 519 with a standard deviation of 105. for females avg math score was 484 with
Suppose that verbal scores on SAT exam have a normal distribution with a population mean 500 points and population standard deviation of 100.
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