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A medical report describes a new method of treating a major form of blindness in elderly people. The process, using lasers to seal abnormal blood vessels in the eye, was tried on 224 patients. Of those, only 14% went blind in one year. In a control group of similar untreated patients, 42% went blind in one year. Therefore, to determine whether the laser treatment was effective, research physicians wished to compare the proportions of patients going blind in one year for two different populations.
Read the following cases and for each of the case,
(a) Describe the population of interest.
(b) Describe the sample.
(c) Identify the variable of interest.
Use the AFN equation to forecast the additional funds Carter will need for the coming year.
Section 1: Histograms and Visual Interpretation - Using the total and gender variables in your grades.sav data set, create histograms
You had calculated the following measures of central tendency: the mean, the median, and the mean trimmed 25%. Which of these measures of central tendency will change when you correct the recording error?
Do you think the actual number in the "≥ 300 " range would equal the expected number in this range? If so, why? If not, why not?
a sample of the homes currently offered for sale revealed that the mean asking price is 75900 the median 70100 and the
Find the probability that the number of U.S. adults who have very little confidence in newspapers is ? (a) exactly? five, (b) at least? six, and? (c) less than
Explain the rationale for your selection in (a). Specifically, why would this be the appropriate statistical approach?
Suppose that the resistance to break of a rope, in pounds, is equally distributed with an average of 100 pounds and a standard deviation of 16. What is the probability that said rope breaks with a force over 132 pounds?
A student scores 80, 90, and 70 on three exams. Find the weighted mean of the student's three scores, where the score of 80 counts 10 percent
What is d, the difference between any 2 terms? Using the formuls for the nth term of a arithmetic sequence, what is 101st term?
Determine whether the hypothesis test involves a sampling distribution of means that is a normal distribution, Student t distribution, or neither.
the center of disease control and prevention reported the diastolic blood pressure of adult women in the us are
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