Answer: Our required probability is 0.88.
Step-by-step explanation:
Since we have given that
Number of male students are smokers = 10
Number of male students are non smokers = 490
total number of male students = 500
Number of female students are smokers = 40
Number of female students are non smokers = 363
Total number of female students = 403
Probability that both are non smokers is given by

Hence, our required probability is 0.88.
Answer:
Domain: 337, 674, 1011, 1348
Range: 1,2,3,4
Answer:
|x - 2| = 15 ; |x + 2| = 15
Step-by-step explanation:
Given that:
Wait time = 15 minutes
Variation in wait time depending on level of hotness = 2 minutes
X ± 2 = 15
x + 2 = 15 or x - 2 = 15
x = 15 - 2 = 13 or x = 15 + 2 = 17
Hence, to express the above as an absolute value equation :
|x - variation| = mean time
|x - 2| = 15 ; |x + 2| = 15
Answer:
1) biased sample
2) random sampling
Step-by-step explanation:
Since the results are based on feedback of students in only one class, it's not a good representative of the entire student body.
Also, since it's a math class there will be a bias.
Better method would be randomly selecting students from the entire school students list and take their feedback