Acompany has developed a new power cell and wants to estimate its average lifetime. a random sample of 650 power cells is tested and the average lifetime of this sample is found to be 315 hours. the 315 hours is the value of a:

The 315 hours is the value of a: statistic

Step-by-step explanation:

A random sample of 650 power cells is tested and the average lifetime of this sample is found to be 315 hours.

The 315 hours is the value of a: statistic

A statistic is defined as a characteristic of a sample. It is used to estimate the value of a population parameter.

Just like here where a random sample of 650 power cells were taken for a test. And 315 hours is an example of a statistic.

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

answer is : muchas/tipicas

have a nice day!

~recklesschicken