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Margarita [4]
3 years ago
5

Exposure to microbial products, especially endotoxin, may have an impact on vulnerability to allergic diseases. The following ar

e data on concentration (EU/mg) in settled dust for one sample of urban homes and another of farm homes.
U: 6.0 5.0 11.0 33.0 4.0 5.0 80.0 18.0 35.0 17.0 23.0
F: 2.0 15.0 12.0 8.0 8.0 7.0 6.0 19.0 3.0 9.8 22.0
(a) Determine the sample mean for each sample. (Round your answers to two decimal places.)
Mathematics
1 answer:
12345 [234]3 years ago
6 0

Answer:

sample mean for Urban homes=21.545

sample mean for far homes=10.164

Step-by-step explanation:

The sample mean of urban homes can be calculated as

sample mean of urban homes=xbarU=∑ui/number of values in U=∑ui/n

xbarU=6+5+11+33+4+5+80+18+35+17+23/11

xbarU=237/11

xbarU=21.545

The sample mean of farm homes can be calculated as

sample mean of farm homes=xbarF=∑fi/number of values in F=∑fi/n

xbarF=2+15+12+8+8+7+6+19+3+9.8+22/11

xbarF=111.8/11

xbarF=10.164

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Brandon made $38.00 in 3 hours. How much would he make in 10 hours
Bad White [126]

Answer:

He would make $126.70 in 10 hours.

Step-by-step explanation:

First, you have to find the unit rate, in other words, how much money he earns in one hour. To do that, you have to divide.

38.00÷3= 12.666667

Once you know how much money Brandon earns in one hour($12.67), you multiply that number by 10.

12.67×10= 126.70

In conclusion, the answer to this solution($126.70) is how much money he earns in 10 hours.

3 0
3 years ago
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Write the equation in slope-intercept form y−6=−2/5(x−10)
stellarik [79]

Answer: y = -2/5x + 10

Step-by-step explanation:

y − 6 = − 2/5 (x − 10)

do distributive property

y - 6 = -2/5x + 4

add six to both sides

y = -2/5x + 10

boom the answer :v

5 0
2 years ago
Each month, a phone company charges $20 for 500 minutes of talk time plus $0.45 for each additional minute. Unlimited texting co
slavikrds [6]

Answer:

Hello there! I hope your having a good day. I'm not exactly sure about this answer: 50o=30 u+(20m+.45a)

Step-by-step explanation:

8 0
3 years ago
Name the polygon with seven sides_____
Andru [333]

a polygon with seven sides is called a heptagon

7 0
3 years ago
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4) A window is in the form of a rectangle surmounted by a semicircle. The rectangle is of clear glass, whereas the semicircle is
lisov135 [29]

Answer:

l=0.1401P\\

w =0.2801P

where P = perimeter

Step-by-step explanation:

Given that a window is in the form of a rectangle surmounted by a semicircle.

Perimeter of window =2l+\pid/2+w

P= 2l+3.14 (w/2)+w

Or P = 2l+2.57w\\l = \frac{P-2.57w}{2}

To allow maximum light we must have maximum area

Area = area of rectangle + area of semi circle where rectangle width = diameter of semi circle

A=lw +\pi \frac{w^2}{8}

A=lw +\pi \frac{w^2}{8}\\A=w*\frac{P-2.57w}{2}+0.3925w^2\\2A= Pw-2.57w^2+(0.785w^2)\\2A' = P-5.14w+1.57 w\\2A" =-5.14+1.57

Hence we get maximum area when i derivative is 0

i.e. P-5.14w+1.57 w=0\\3.57w =P\\w = \frac{P}{3.57} =0.2801P

l = \frac{P-2.57w}{2}\\l = 0.1401P

Dimensions can be

l=0.1401P\\w =0.2801P

5 0
3 years ago
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