Answer:
7
Step-by-step explanation:
you know what to do with a different person and you know what to do with a different person and you know what to
Answer:
the first one is 8 and the second one is 1 3/8
Check your formula, and if its slope its y=mx+b. Good luck you have the right answer.
Answer:
; minimum
Step-by-step explanation:
Given:
The function is,
The given function represent a parabola and can be expressed in vertex form as:
The vertex form of a parabola is , where, is the vertex.
So, the vertex is .
In order to graph the given parabola, we find some points on it.
Let
So, the points are .
Mark these points on the graph and join them using a smooth curve.
The graph is shown below.
From the graph, we conclude that at the vertex , it is minimum.
Answer:
a) There is no enough evidence of an increase in life expectancy.
b) P-value=0.07.
The P-value indicates that this sample result is not rare to happen (is greater than the significance level) even if the mean of the population is still 87 hours.
Step-by-step explanation:
We have to perform a hypothesis test on the mean, with known standard deviation of the population.
The null hypothesis, which we will reject or not, states that the life expectancy has not increase (it stays equal or less than 87 hours).
The null and alternative hypothesis are
The significance level is α=0.01.
The z-value is
The P-value for z is
The P-value (0.07) is greater than the significance level (0.01), so the effect is not significant. We fail to reject the null hypothesis.
There is no enough evidence of an increase in life expectancy.