(a)A random sample of 10 houses in a particular area, each of which is heated with natural gas, is selected and the amount of ga
1 answer:
Answer:
Step-by-step explanation:
From the given sample of 10 entries we find
Mean =119.2
Median =120
Point estimate of μ.=
b) Suppose there are 25,000 houses in this area that use natural gas for heating. Let τ denote the total amount of gas used by all of these houses during January.
τ =
c) Proportion would be sample proportion =
d) Population median usage = sample median usage = 120
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Answer:
6/5 or 1.2, they're the same value
Step-by-step explanation:
When it says "rate of change", it's really just asking for the slope. If you don't know what the slope is, essentially how much the y-value increases by whenever x increases by 1. This can be formally defined using the equation: which is essentially
. The subtraction is finding the difference between the two numbers to see how much it's changed by. Btw the order doesn't matter, I could plug in (-3, -2) as (x2, y2) or I could plug it in as (x1, y1) as long as I make sure to input it in correctly. In this example I'll just say (-3, -2) = (x1, y1) and (2, 4) = (x2, y2). Plugging these values into the equation gives you:
that's the rate of change