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Question - Insomnia and pain. A recent study looked at the relationship between insomnia and pain among parents and adolescents.6 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.
The Motion Picture Association of America studies the ethnicity of moviegoers to understand changes in the demographics of moviegoers over time. Here are the numbers of moviegoers (in millions) classified as to whether they were Hispanic, African-..
Finish the probability distribution of X below. Use four decimals in each of your entries - How many goals would you expect this hockey player to score?
Assignment: Proposing Recommendations from Clinical Data. Briefly describe the summary statistics of the participants
Calculate the descriptive statistics from the data and display in a table. Be sure to comment on the central tendency,variability (both absolute and relative)as well as shape for each variable - Draw a graph that displays the distribution of the qu..
Find the given descriptive statistics for Kalamazoo County, Michigan: Of those who are 25 or older, the percentage who are high school graduates
Find a 95% confidence interval for the true mean value of Y when x = 31.5. Find the width of the resulting interval.
A researcher is investigating whether non-white minorities commit a disproportionate number of homicides. He uses demographic data from Detroit.
A five-star hotel accepts 100 room reservations daily. For each reservation accepted, there is a 7% chance that the guest will not arrive.
What quantity would be ordered under this policy, and what is the projected profit under the three sales scenarios?
Suppose the top 15 percent of producers get bonuses and the average production rate is 200 units with a standard deviation of 20. What would be the z-score of someone who produces 240 units?
A sample space includes the events A, B, and C. Draw a Venn diagram in which events A and B are mutually exclusive but events B and C are not mutually exclusive.
Does the value of the sample linear correlation coefficient, r, indicate that there is a linear dependency between the two variables in the population from which the sample was drawn? Briefly explain how to answer this question.
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