The average commute for 95% of the students is between 19.0 and 4.2 miles.
The average distance is 19 miles.
Therefore, the standard deviation is 4.2 miles.
A) 2.7 = 19 - a(4.2)
where;
a deviates from the mean by a certain number of standard deviations. Thus;
a = (19 - 2.7) ÷ 4.2
a = 3
In a normal distribution, 3 standard deviations from the mean indicate that 95% of the data falls within that range.
B) The data are 2 standard deviations apart from the mean at the 95% confidence level. Thus;
CI = 19 ± 2(4.2)
CI = (18 - 10.2) OR (18 + 10.2)
CI = (7.8, 28.2)
Learn more about confidence intervals at
brainly.com/question/17097944
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9/10 = 0.9
3/5 = 0.6
Hope this helps.
Answer:
The total number of people at the stadium was 3200.
Step-by-step explanation:
5% = 160
160 x 20= 3200
Since 20 x 5 is 100, I multiplied 160 by 20 to get 3200.
4x - 91x + 8 = -87x + 8
6x - 4 + 2x + 9 = 8x + 5
8x + 3+ 7xy - 2 + x - 5xy = 2xy + 9x + 1
Answer
B DID THE TEST
Step-by-step explanation:
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