Mr Dotson wants to know if The neighbors on his street would be interested in a community watch he surveyed every fourth household on the street and concluded that 70% would be interested

It is valid because it is a systematic random sample.

Step-by-step explanation:

with example?

In Systematic random sampling it involves the random sampling method which also involves selecting of samples on the premix/basis on a system of intervals in a numbered population. It is also a way/means samples selection at a particular preset interval.

It can be broken down into steps examples

1.calculate and quickly fix the sampling interval. (The number of elements in the population divided by the number of elements needed for the sample.)

2 Take a random starting point between 1 and the sampling interval.

3. repeat the sampling interval to choose subsequent elements.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

answer: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

step-by-step explanation: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.