Question

In: Statistics and Probability

A study was conducted to investigate whether or not exercise is a factor in the overall...

A study was conducted to investigate whether or not exercise is a factor in the overall outlook and positive spirit of Denton County residents. For the study, 400 Denton County residents were selected at random from each of the following two categories: those who exercise on a regular basis and those who do not. For the purpose of this study, the term “regular exercise” was well defined for all participants. A total of 800 people completed a brief telephone survey. Of those who exercise regularly, 74% said that their overall outlook on life was positive. Of those who did not exercise regularly, 68% said that their overall outlook on life is positive. Though not a definitive study, the researches concluded that exercise does appear to influence the attitudes of Denton County residents. In addition, the researchers estimated that approximately 71% of all Denton County residents have a positive outlook. Further research will likely be conducted on the subject at a later time.

Is the 68% found in this study best described as a statistic or a parameter? Why?

Solutions

Expert Solution


Related Solutions

A study was conducted to investigate whether a new diet lowers cholesterol. The researchers took a...
A study was conducted to investigate whether a new diet lowers cholesterol. The researchers took a random sample of 100 subjects with high cholesterol and measured the cholesterol levels for each. Then each subject began the new diet as instructed. After six months, the subjects' cholesterol levels were measured again. The differences in cholesterol level, calculated as After - Before, follow an approximately normal distribution. Suppose a 99% confidence interval for the mean cholesterol difference is (-13.89, -7.66). Which of...
A study was conducted to investigate whether compliance training affected the productivity of the company’s administrative...
A study was conducted to investigate whether compliance training affected the productivity of the company’s administrative staff. A random sample of 30 administrative staff underwent compliance training. Download and open the Accounts.xlsx file in Excel. This file contains the number of accounts processed by each staff member both in the week before compliance training and again in the week after compliance training. Use Excel to carry out a suitable test to address the following research question: Is there a difference...
a study was conducted to investigate the effectiveness of acupuncture in reducing pain.
a study was conducted to investigate the effectiveness of acupuncture in reducing pain.
Medical researchers conducted a study to determine whether treadmill exercise could improve the walking ability of...
Medical researchers conducted a study to determine whether treadmill exercise could improve the walking ability of patients suffering from claudication, which is pain caused by insufficient blood flow to the muscles of the legs. A sample of patients walked on the treadmill every day and after six months the mean walking distance was measured. A control group of patients that did not walk on the treadmill were also measured for mean walking distance. The data for each group is as...
Medical researchers conducted a study to determine whether treadmill exercise could improve the walking ability of...
Medical researchers conducted a study to determine whether treadmill exercise could improve the walking ability of patients suffering from claudication, which is pain caused by insufficient blood flow to the muscles of the legs. A random sample of 48 patients walked on a treadmill for six minutes every day. After six months, the sample mean distance walked in six minutes was 348 meters, with a sample standard deviation of 80 meters. For a control group of 46 patients who did...
Consider the following studies: Study 1: A study was conducted to investigate the effects of alcohol...
Consider the following studies: Study 1: A study was conducted to investigate the effects of alcohol consumption on handeye co-ordination. 200 people were interviewed and their level of alcohol consumption over the previous five years was assessed and classified as either low, medium or high. Each person was then given a series of tasks resulting in a hand-eye co-ordination score. Study 2: A study was conducted to investigate the efficacy of a new iron tablet compared to a currently used...
A study is conducted to investigate the use of a technique called radionuclide venticulography as a...
A study is conducted to investigate the use of a technique called radionuclide venticulography as a test for detecting coronary artery disease. The results are tabulated below. Screening Test              CAD                    No CAD Positive                          302                        80 Negative                       179                       372 What is the sensitivity of the screening test? Please record your answer as a decimal, not a percent and round to two decimal places.
A study is conducted to investigate the impact of depression on a patient’s ability to survive...
A study is conducted to investigate the impact of depression on a patient’s ability to survive cardiac disease. They evaluated 477 participants for depression and followed for 4 years. There were 374 patients with no depression (ND) and 69 of them died. Out of 103 patients with minor or major depression (D), 28 died. Does it appear that the depressed (D) patients with cardiac disease are more likely to die than non-depressed (ND) patients with cardiac disease? Conduct a test...
A study was undertaken to investigate the effectiveness of an aquarobic exercise program for patients with...
A study was undertaken to investigate the effectiveness of an aquarobic exercise program for patients with osteoarthritis. A convenience sample of 70 individuals with arthritis was selected, and each person was randomly assigned to one of two groups. The first group participated in a weekly aquarobic exercise program for 8 weeks; the second group served as a control. Several pieces of data were collected from the individuals, including their total cholesterol (mg). Determine if there is a significant difference in...
A study was conducted to investigate the influence of a driver's age, number of driving years...
A study was conducted to investigate the influence of a driver's age, number of driving years and attention span (the higher, the more detailed) on the number of speeding tickets within the last five years. Given a driver at age 30, who has been driving for 10 years with an attention span score of 5, what is the number of tickets that can be expected? Data can be found in the tickets tab. 8 32 16 7 6 35 19...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT