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Alchen [17]
3 years ago
15

Let X represent the SAT score of an entering freshman at University X. The random variable X is shown to have a N(1200, 90) dist

ribution. Let Y represent the SAT score of an entering freshman at University Y. The random variable Y is know to have N(1215, 110) distribution. A random sample of 100 freshman is obtained form each university. Let X bar = the sample mean of the 100 scores from university X and Y bar = the sample mean of the 100 scores from University Y. What is the probability that X bar will be greater than Y bar?
Mathematics
1 answer:
Lelechka [254]3 years ago
4 0
The correct answer to this question is 0.1456. This is <span>the probability that X bar will be greater than Y bar. </span>Probability is the measure of how likely an event is. The formula is the ratio of the number of favorable outcomes to the total number of possible outcomes. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help. 
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Find derivative of 2cosx+2cos2x
Zarrin [17]
Derivitive of cosx=-sinx
dy/dx sinx=cosx
and use chain rue

2cosx=-2sinx
2cos2x=-4sin2x
so
-2sinx-4sin2x id the deritivitve
7 0
3 years ago
You can answer only this question, it's ok:
Sophie [7]
1)100 or A
Angle = |30*H - (11/2)*M|, where H is the hours hand and M is the minutes hand

in this case: H = 4, M= 40
30*4 - (11/2)*40 = 120 - 220 = -100 = |-100| = 100
2)x=4y or C
If you plug in 0,0 you will get 0=4×0 or 0,0

7 0
3 years ago
Rescooperate Ice Cream Shop recently analyzed their books. They found that in the past year, they made $100,000 selling ice crea
RoseWind [281]

Answer:

I believe the correct answer would be A.) Profit.

Step-by-step explanation:

This is because <em>revenue</em> is the amount earned, which, in this case is $100,000. Loss is not a proper term. The proper term would be <em>expense. </em>This is the amount spent or lost. The correct answer would be <em>profit. </em>Profit just means the amount left after the expenses have been deducted from the revenue.

Hope this helps,

♥<em>A.W.E.</em><u><em>S.W.A.N.</em></u>♥

7 0
3 years ago
The sum of two numbers is 85. twice one number plus four times the other is 218. find the numbers
Nina [5.8K]
X + y = 85
2x + 4y = 218
x = 85 - y 
<span>2(85 - y) + 4y = 218 </span>
<span>170 - 2y + 4y = 218 </span>
<span>170 + 2y = 218 </span>
<span>2y = 48 </span>
<span>y = 24 </span>
<span>x = 61</span>
6 0
3 years ago
A rental car costs $65 for one day plus an additional $0.35 per mile.
vredina [299]

Answer:

$105.25

Step-by-step explanation:

$0.35 x 115 = $40.25

$40.25 + $65 = $105.25

Have a great day!

5 0
3 years ago
Read 2 more answers
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