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Insomnia and education. Is insomnia related to education status? Researchers at the Universities of Memphis, Alabama at Birmingham, and Tennessee investigated this question in the Journal of Abnormal Psychology (February 2005). Adults living in Tennessee were selected to participate in the study using a random-digit telephone dialing procedure. Two of the many variables measured for each of the 575 study participants were number of years of education and insomnia status (normal sleeper or chronic insomnia). The researchers discovered that the fewer the years of education, the more likely the person was to have chronic insomnia
(a) Identify the population and sample of interest to the researchers.
(b) Describe the variables measured in the study as quantitative or qualitative.
(c) What inference did the researchers make?
a major department store chain had planned to reach a sales goal of 50 refrigerators per store at a recent
To determine the proportion of people in your town who are smokers, it has been decided to poll people at one of the following local spots:
Find a graph other than a histogram that shows the distribution of a quantitative variable in a newspaper or magazine article.
what are the four states of the decision environment? discuss which management science techniques could be useful for
Serum ferritin is used in diagnosing iron deficiency. In a study conducted recently researchers discovered that in a sample of 28 elderly men the sample standard deviation of serum ferritin was 52.6 mg/L. For 26 younger men the sample standard dev..
Write a program that will generate a table of maximum allowable span lengths for a group of 2-in.-thick planks as a function of applied uniformly distributed load.
What is the probability that the total weight of eight people exceeds 1300 pounds? 1500 pounds? (Assume that the probability distribution is approximately normal).
Describe what the pattern looks like and what conclusions you might draw from it. (1 paragraph) As a manager what would be your process for PDSA?
An insurance company states that 90% of its claims are settled within 5 weeks. A consumer group selected a random sample of 100 of the company's claims and found 75 of the claims were settled within 5 weeks.
What is the probability that the mean breaking strength of the 3 untreated specimens is at least 25 pounds greater than the mean strength of the 3 treated specimens?
(AT) The dataset ADHD Treatment has four scores per subject. a. Is the design between-subjects or within-subjects?
explain what is wrong with each of the followinga. you can use a significance test to evaluate the hypothesis hophat0.6
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