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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
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
No, there is not sufficient information to reject the hypothesis that the proportion of cats and the proportion of dogs that sleep more than 10 hours per day are the same because the test value -0.65 is inside the acceptance region (-1.96,1.96).
A recent article in the Arizone Republic indicated that the mean sellingprice of the homes in the area is more than $220,000. Can we conclude that the mean selling price in the Goodyear, AZ area is more than $220,000.
Assume a one-tailed t -test is being applied to determine if population mean is less than $212. Level of significance chosen is 0.01 and 26 accounts are sampled. Determine the critical value?
A local group claims that the police issue more than 60 speeding tickets a day in their area.
If statistically significant, do you think the difference is large enough to be important?
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
When the Sharpe Ratio for the market portfolio is 0.5, what risk-free rate Rf is the market anticipate? Draw on a diagram for the Capital Market Line derived from the above data. Make sure to clarify the intercept and the slope.
Suppose that a model for the joint distribution of these rvs is a bivariate normal distribution.
Determine the p-value; and at 95% confidence, test the above hypotheses.
Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error?
The following data shows the packages gathered for delivery for ten days and the proportion of packages received not delivered to the customers at expected time.
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