Answer:
Paedtricians claim isn't true.
Step-by-step explanation:
The hypothesis :
H0 : σ = 7
H0 : σ > 7
The test statistic ; χ² :
χ² = [(n - 1) * s²] ÷ σ²
n = 25 ; s = 4.3, σ = 7
χ² = [(25 - 1) * 4.3²] ÷ 7²
χ² = [(24 * 4.3²] ÷ 49
χ² = 443.76 / 49
χ² = 9.056
At α = 0.01 ; critical value = 42.980
Since critical value > test statistic, we fail to reject the null, H0.
9514 1404 393
Answer:
y = -9x +49
Step-by-step explanation:
The slope of line b is the same as the slope of line a. That can be found using the slope formula:
m = (y2 -y1)/(x2 -x1)
m = (-1 -8)/(2 -1) = -9
The y-intercept can be found from the given point using the formula ...
b = y - mx
b = 13 -(-9)(4) = 13 +36 = 49
Then the slope-intercept equation of line b is ...
y = -9x +49
Answer: Hello there!
First, the area of the earth is:
510.1 million km^2
and the total population of the heart, averaged, is:
7700 million
now we need to see the quotient between these numbers:
A = (510.1 million km^2)/(7700 millions) = (510/7700)km^2 = 0.066km^2
this means that each person gets 0.066km^2
Now, this is not part of the problem per se, but you also need to remember that most of the total area of the earth is inaccessible (the ocean, both poles, etc) where this inhabitable section is almost the 57% of the total area of the earth.
If you want to only divide the habitable area; we get:
A = (510.1*(1 - 0.57))/7700)km^2 = (510.1*0.43/7700)km^2 = 0.066*0.43 km^2 = 0.028 km^2
you can see that if we only divide the habitable area, the portion that you get is a lot smaller.