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Healthcare issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid and have no private health insurance. The ages of 25 uninsured senior citizens were as follows:
60 61 62 63 64 65 66 68 68 69 70 73 73 74 75 76 76 81 81 82 86 87 89 90 92
Compute the arithmetic mean age of the uninsured senior citizens to the nearest hundredth of a year.
1. 68 years
2. 73 years
3. 74 years
4. 76 years
Do the data from this sample provide evidence for a significant increase in REM activity during exams? Use a one-tailed test with _ = .01. B.) Compute Cohen's d to estimate the size of the effect.
If two randoom samples of sizes n1 = 30 and n2 = 36 are selected independently from two populations with mean 78 and 85, and with standard deviations 12 and 15, respectively, then the standard error of the difference between Xbar1 and Xbar2 are eq..
Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution.
Suppose n progeny are to be examined, and let P^ be the sample proportion of purple-owered plants. It might happen, by chance, P^ that would be closer to 1/2 than to 9/16. Find the probability that this misleading event would occur if:
Determine the average amount of time that a guest spends checking in. How would this change under each of the state options?
Write a paragraph summarizing the results of the analysis and determine whether the calculated values of chi-square are statistically significant
She collected the employee performance ratings recorded before and after workshop attendance and stored the paired ratings for all 35 in Perform.
A food snack manufacturer samples 13 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 14.7 oz. and the sample standard deviation is 0.50 oz., find the 95% confidence interval of the true mean.
In study of a clinical for an allergy drug 115 of the 204 subjects reported experiencing important relief from their symptoms.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.500 inches.
A journal polled its readers to determine the proportion of wives who, if given a second chance, would marry their husband again.
If standard deviation is 50 hours and α is equal to 0.01, what values for mean x will result in rejection of null hypothesis.
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