Mathematics, 25.01.2021 22:20, kaamri97
Calories consumed by members of a track team the day before a race are normally distributed, with a mean of 1,800 calories and a standard deviation of 100 calories. If a normal curve is sketched using these data, what is the range for 3 standard deviations to the right and to the left of the mean?
0β3,600
1,700β1,900
1,600β2,000
1,500β2,100
The answer is 1,500β2,100
How to find this:
The mean is 1800
The standard deviation is 100
(Subtract 100 from the mean 3 times)
1800 - 100 = 1700
1700 - 100 = 1600
1600 - 100 = 1500
(Add 100 to the mean 3 times)
1800 + 100 = 1900
1900 + 100 = 2000
2000 + 100 = 2100
(The answers are your range)
1500 - 2100
I just took the test, hope this helps!
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