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barxatty [35]
3 years ago
5

For a daily airline flight between two cities, the number of pieces of checked luggage has a mean of 380 and a standard deviatio

n of 20. What number of pieces of checked luggage is 3 standard deviations above the mean?
Mathematics
2 answers:
Helen [10]3 years ago
8 0

Answer:

The answer is 440 pieces of checked luggage

Step-by-step explanation:

Mean = 380

Standard deviation = 20

No. of pieces of checked luggage for 1 standard deviation = 20 pieces

Therefore, Mean for 3 standard deviations above the mean = 3 × 20 = 60

Now, number of pieces of checked luggage 3 standard deviations above the mean = Mean for 1 standard deviation + Mean for 3 standard deviations above the mean

⇒ 380 + 60 = 440 pieces

Olegator [25]3 years ago
3 0
<span>Since one standard deviation is 20 luggages, 3 standard deviations above the mean is 3*20=60 luggages above the mean of 380 luggages, so 60+380 gives the answer C, 440.</span>
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