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Answer :
The sample distribution's mean is 8%, or 0.08, and the standard deviation is given number by - = 8.58 n*p = 1000*0.
In its most basic form, a ratio is a comparison between two comparable quantities. There are two types of proportions One is the direct proportion, whereby increasing one number by a constant k also increases the other quantity by the same constant k, and vice versa. If one quantity is increased by a constant k, the other will decrease by the same constant k in the case of inverse proportion, and vice versa.
8% of adults are known to have never had a cavity. An srs of 1000 adults is contacted by a dentistry graduate student.
8% of 1000 is,\s= (8/100)×1000.\s= 80.
Now, The percentage of people who have never had a cavity is (1000 - 80)/100, which translates to the probabilty of 920/1000, 92/100, or 0.92.
To learn more about probabilty from the link: https://brainly.com/question/30034780
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