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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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How far up the house would a ladder be resting if it is 25 ft long and 3 ft
Lena [83]

Answer:

C

Step-by-step explanation:

The last one is absurd. You can't have a ladder reaching higher than itself. The question is a Pythagorean problem.

Givens

a = 3

b = ?

c = 25 feet

Formula

a^2 + b^2 = c^2

Solution

3^2 + b^2 = 25^2

9 + b^2 = 625                  Subtract 9 from both sides.

b^2 = 625 - 9

b^2 = 616                        Take the square root of both sides.

b = sqrt(616)

b = 24.8

6 0
3 years ago
Find the slope of the line through each pair of points. (15, 8), (-1, 15).
Natalija [7]

Answer:

22.6

Step-by-step explanation:

15-1   8-15

14^2     7^2

196+49

245

15.6

8 0
3 years ago
You have a pool that measures 8 yards by 10 yards. You want to build a deck around all four sides of the pool and you want to in
gladu [14]
Given:
pool length : 10 yards
pool width : 8 yards

Area = 10 yds * 8 yds = 80 yd²

(10 + 2x)(8 + 2x) = 120 
10(8 + 2x) + 2x(8+2x) = 120
80 + 20x + 16x + 4x² = 120
4x² + 36x + 80 - 120 = 0
4x² + 36x - 40 = 0
4(x² + 9x - 10) = 0
4(x + 10)(x - 1) = 0

x + 10 = 0
x = -10
x - 1 = 0 
x = 1

the width of the deck is 1 yard


7 0
3 years ago
The cost of a jacket increased from $85.00 to $94.35. What is the percentage increase of the cost of the jacket?
Serggg [28]
It's an 11% increase. To find this,  you have to subtract 85 from 94.35 and then you divide that difference by the original amount. In this case it's 85. After that, you get .11. Then you just turn it into a percent.
8 0
3 years ago
I'm supposed to write out an algebraic equation, and then solve the equation. If you can help me, with work shown, you'll get vo
Arada [10]

Answer:

simple just follow me and mark it brainliest

Step-by-step explanation:

LET THE THREE CONSECUTIVE EVEN INTEGERS BE

(x+2) ,(x+4) ,(x+6)

then

according to the question

4(x+2) – (x+6) = 2(x+4) + 6

4x + 8 – x – 6= 2x + 8+6

3x +2 = 2x + 14

3x – 2x= 14 –2

x= 12

the numbers are

14

16

18

5 0
3 years ago
Read 2 more answers
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