The domain of g(x) =(x+1)(2x-5) is (-4,-2,01) what is the range

It has been decided that 100 people need to be surveyed to decide the publics opinion on a school building project. A student su

Morgarella [4.7K]

Answer:

The proposed way of sampling is a biased way to perform the survey.

Step-by-step explanation:

Convenience sampling is a kind of non-probability sampling method that comprises of the sample being taken from that portion of the population that is near to hand. In this type of sampling method, all items doesn’t have an equivalent chance of being selected, which doesn’t comprises of random collection of items.

Convenience sampling is where we take in items which are easy to reach.

Convenience sampling consists of selection bias, i.e.e the bias involved in the sample due to inappropriate selection procedures.

For example, randomly selecting 4 people sitting near him to guesstimate the mean age of the class is a convenience sampling example. or gathering information on customer satisfaction by interviewing 6 randomly selected customers from a local store is an illustration of convenience sampling.

In this case, the sample suggested by the students consists of surveying the first 100 people who enter the school, about the public opinion on a school building project.

This is an example of convenience sample.

So, there is a selection bias present in the sample.

Thus, the proposed way of sampling is a biased way to perform the survey.

4 0

3 years ago

Write a two-column proof. Given: 7y = 8x - 14; y = 6. Prove that : x = 7.

svet-max [94.6K]

Answer:

Given: $7y =8x-14$ , y =6

To prove: x =7

On substituting the value of y =6 in the equation 7y = 8x -14 to solve for x.

$7(6)= 8x - 14$

or

42 = 8x -14 ......[1]

Addition Property of equality states that you add the same number to both sides of an equation.

Add 14 to both sides in equation [1];

42+14 =8x -14+14

Simplify:

56 = 8x

or

8x =56 ......[2]

Division Property of equality states that you divide the same number to both sides of an equation.

Divide by 8 to both sides of an equation [2];

$\frac{8x}{8} =\frac{56}{8}$

Simplify:

x =7 Hence proved!

A two Column proof:

Statement Reason

1. 7y = 8x -14 Given

y= 6

2. 7(6) = 8x -14 Substitution property

3. 42+14 = 8x Addition property of equality

4. 56 =8x Simplify

5. x =7 Division Property of equality

4 0

2 years ago

Read 2 more answers

Find the area of the shaded region. Please help! Brainliest to who gets it right !

damaskus [11]

0.367 centimeters squared

7 0

2 years ago

Businesses in a country are listed by size: small, medium, and large. Explain why business size is an example of an ordinal-scal

dem82 [27]

Answer: C. The size of a business is ordinal-scaled because it has values that can be used as an order or rank of a categorical variable.

Step-by-step explanation: Ordinal variables are simply categorical in nature just like nominal variables, however, the difference exists in the fact that ordinal labels posses an ordered rank or level unlike nominal variables. Though the extent or width of the difference between these labels cannot be ascertained. In the scenario above, size of businesses are labeled qualitatively with labels such as : small, medium and large. This labels depicts and follow a certain order with small being the least, then medium, then large. Telling us large businesses are superior in size to small and medium and medium is superior to large. Though the extent of the difference cannot be accurately ascertained.

4 0

3 years ago

Jake sold 36 tickets to the school fair, and Jeanne sold 15 tickets. what is the ratio, in simpliest form, to the number of tick

anzhelika [568]

Answer:

I kinda forgot how to do ratios but i think it would be 12 and 5

Step-by-step explanation

Jake Jeanne

36 15

12 5

8 0

2 years ago