7. A survey of 800 college students is conducted to see whether they are a new...
7. A survey of 800 college students is conducted to see whether
they are a new student this
quarter or not. The random variable respresents the number of
students enrolled as a new student. Is
this a binomial experiment? Why or why not?
Yes or No (Circle One)
8. A recent survey found that 79% of all adults over 50 wear sunglasses for driving. In a random sample of 80 adults over 50, what is the mean and standard deviation of those that wear sunglasses?
Mean :__________
Standard Deviation :________
Homework Answers
Question 7
Answer:
Yes, because this experiment has only two outcomes as new or old.
Question 8
We are given n = 80, p = 0.79, q = 1 – p = 1 – 0.79 = 0.21
Mean = np = 80*0.79 = 63.2
Mean = 63.2
Standard deviation = sqrt(npq) = sqrt(80*0.79*0.21) = 3.643076
Standard deviation = 3.643076
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7. A survey of 800 college students is conducted to see whether
they are a new...
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