Statıstıcs I Deneme Sınavı Sorusu #836441
Assume that waiting time to connect to internet at your home is normally distributed with a mean of 270 seconds and a standard deviation of 90 seconds. Find the probability that you can connect to internet in less than 210 seconds in terms of standard normal distribution?
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0.5 – P(z = 1/3) |
|
0.5 – P(z = 2/3) |
|
0.5 + P(z = 1/3) |
|
0.5 + P(z = 2/3) |
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1 – P(z = 1/3) |
Yanıt Açıklaması:
z = (x – m) / sd ; (210 – 270) / 90 = -2/3 ; P(z <= (-2/3)) = P(z >= 2/3) = 0.5 – P(z = 2/3) . pg. 200. Correct answer is B.
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