10×(9 × 6 +2 to the power of 2)-9 in order of operation

A city has designed a survey to collect information about residents’ opinions about city services. Which of the following descri

Maslowich

Bias refers to scenarios which might affect the ability of a statistical experiment to generalize, hence affecting the validity of research. Non-response bias occurs when majority of subjects fail to respond during a survey. Hence, a likely scenario is ; surveys were mailed to 500 people, and 200 of the surveys were completed and returned.

Non - response bias has to do with a situation whereby a large percentage of the selected samples from a population do not respond or fail to participate in the experiment or survey.

If 200 surveys were returned, then 300 of the sample participants did not respond. Which means 60% of the sample are non-responsive.

Therefore, a scenario where surveys were mailed to 500 people, and 200 of the surveys were completed and returned exemplifies a non - response bias.

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6 0

3 years ago

A science experiment calls for 3/4 cup of salt. Lee's measuring cup holds 1/8 cup. How

NISA [10]

Answer:

$\frac{1}{6}$

Step-by-step explanation:

1/8 ÷ 3/4 is 1/6 because that's as many times it can go into to it and u would have to do keep chang flip

1

$\frac{1}{8} \div \frac{3}{4} \\ \frac{1}{8} \times \frac{4}{3} = \frac{4}{24} \\ \frac{4}{24} \div \frac{4}{4} = \frac{1}{6}$

5 0

3 years ago

Please solve the combination of equations here.

klemol [59]

Answer:

$\left \{ {{x=5} \atop {y=7}} \right.$

Step-by-step explanation:

$\left \{ {{x+y=12} \atop {3y = 4x+1}} \right.$

$\left \{ {{x=12-y} \atop {3y=4x+1}} \right.$

We are going to do a replacement of x for a second equation

So instead

$3y=4x+1$

in the place of x we are putting 12-y from the first equation, so

$3y = 4(12-y)+1$

To leave the brackets we need to do multiplication

$3y = 4*12-4*y+1$

Which is

$3y = 48-4y+1$

$3y = -4y+49 /+4y\\7y = 49 /:7\\y = 7$

How to determine x? From the first equation:

If the x +y = 12 then the x = 12-y so x = 12-7 = 5

We should write solution as a pair:

$\left \{ {{x=5} \atop {y=7}} \right.$

7 0

3 years ago

Please help me I will mark you Brainiest please

anyanavicka [17]

Hmmm well may I ask what your doing with the shapes bc um well if you put them shapes in the circle/oval why is it hard? I don’t do this stuff I’m confused...

4 0

3 years ago

im's uncle is 4 times as old as his nephew Jim. In 10 years, Jim's uncle age will be 20 years more than twice Jim's age. How old

faltersainse [42]

Answer:

15 years old.

Step-by-step explanation:

Let Jim's age now be one unit (1u).

His uncle's age now is then 4 units.

Jim's age in 10 years = 1u + 10

Jim's uncle's age in 10 years = 4u + 10

In 10 years, Jim's uncle's age will be 20 years more than twice Jim's age.