Suppose you were to read about a study showing that people who sleep less than f

Question

Suppose you were to read about a study showing that people who sleep less than five hours a night have twice as much risk of premature death than people who sleep seven or eight hours a night. Can you conclude that sleeping the shorter hours causes a higher risk of premature death? Why? Circle which of the following is (are) NOT an example of a possible "confounding variable" in this study? [There could be none, one or more than one]. Discuss why. Medications a person is taking. The amount of alcohol a person drinks in the evening. The amount of stress a person is under in their work. The amount of sleep a person gets per night. In the U.S. presidential election of 1936, the Democratic incumbent Franklin Roosevelt was re-elected over the republican challenger Alf Landon. Before the election, the magazine Literary Digest had published the results of a questionnaire sent to 10 million people: 2.3 million people chose to reply to the survey. The poll incorrectly predicted that Landon would win the election. Explain why this prediction was inherently unreliable.

Explanation / Answer

26. in the given data the selection group peeple are 10 million but the replied people are only 2.3 million. here the result opinions are less thant 50% of the selected people . some of the replied people favour to the open person automatically the want the person who likes. and there several reasons for wrong prediction.

5.

a) the shorter hours in sleep causes high premature of deatch is not correct because the sleepness strees highly risck for eyes and some parts of body . it causes headach and other diseases in our body.

b) the alchohal drinking is the confounding variable. becuase it gives different types of results some time the results may be falls . the amount of alcohol dependts on person not depends on the time.

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