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zhannawk [14.2K]
3 years ago
15

Can somebody simplify the expression in the picture I need this grade

Mathematics
1 answer:
Rama09 [41]3 years ago
5 0

Answer:

a^2 - ab + 2b^2

Chose the last option

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To determine the organic material in a dried lake bed, the percent carbon by mass is measured at two different locations. In ord
Sedaia [141]

Answer:

F statistic = 11.3 ;

-1.02

Step-by-step explanation:

____Location1(%C) ____ Location2(%C)

1 ______ 10.40 _________ 10.10

2 _____ 10.20 _________ 10.90

3 ______10.30 _________ 10.20

4 ______10.40 _________ 10.70

5 ______10.20 _________ 10.40

F = larger sample variance / smaller sample variance

Using calculator :

Sample standard deviation (s)

s1² = 0.01

s2² = 0.113

F = s2² / s1²

F = 0.113 / 0.01

F = 11.3

Yes, the two standard deviations for the locations are significantly different at the 95% confidence level.

B.)

Tvalue

x1 = 10.3 ; x2 = 10.46

μ1 = 10.30 ; μ2 = 10.46

(10.30 - 10.46) / sqrt[(0.01/5) + (0.113/5)]

-0.16 / 0.1568438

-1.02

6 0
3 years ago
Need help checking my answers thanks!!
andre [41]

Answer:

yep thats right i think sorry hop i could help

6 0
3 years ago
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