To estimate the mean number of text messages sent by cell-phone users, a researcher chooses a location on a college campus in the city and surveys the first 50 people who walk past. These subjects are asked how many text messages they have sent in the past 24 hours. Is it likely that bias will be present in the sample?

A) Because this is a convenience sample, it is likely that the sample results will be unbiased.
B) Because this is a convenience sample of college students, it is likely that bias is present and that the results will overestimate the mean number of text messages sent.
C) Because this is a convenience sample of college students, it is likely that bias is present and that the results will underestimate the mean number of text messages sent.
D) Because this is a voluntary response sample of college students, it is likely that bias is present and that the results will overestimate the mean number of text messages sent.

Answer:

2820 calories

Step-by-step explanation:

Since 30 can fit into 360, you can divide it.

360/30=12

12 is what you will multiply to the number of calories in 30 minutes.

235*12=2820

Answer:

I won't put a step by step since I converted the equations into decimals which I don't think will help you.

Step-by-step explanation:

0.33 or -0.33 depends on which you look at it.

Answer:

70.3068

explanation:

divide the mass value by 2.205

Answer:

69.75 kg

Step-by-step explanation:

1:0.45

155:x

x=155×0.45

x=69.75 kg

Answer:

5 hours

Step-by-step explanation:

10-2=8 now add the hours

Just plug in the first value for x and see if you get the second value!

The answer is (2,5)

5 = 3 x 2 - 1.

5 = 6 -1

5 = 5

Answer:

picture guide person

Step-by-step explanation:

picture, then guide, and then person ⇔∑ω

Answer:

y= -1/2x

Step-by-step explanation:

Answer:

x=2

Step-by-step explanation:

Step 1_  −(x−6)=4

              −x+6=4(Distribute)

               −x+6=4

Step 2_       −x+6−6=4−6

                   −x=−2

Step 3_       −x    equals   -2

                    −1                   -1

x=2

Hope this helps :)

Answer:

y = 4x + 2

Step-by-step explanation:

Answer:

c on edge

Step-by-step explanation:

Answer: D = Q/A - N

Step-by-step explanation: u just divide both sides by A - N

3y - 4x = 9

3y = 4x + 9

y = 4/3x + 3

Answer:

the answer would be m=4/3

Answer:

b = b2-4ac

= (-7ab)^2 -4 (6a^2)(-3b^2)

= 49a^2b^2 + 72a^2b^2

= 121a^2b^2

Now, x = (7ab +- root 121a^2b^2)÷2(6a²)

= (7ab +- 11ab ) ÷ 12a²

= ( 20ab)/12a² or 4ab/12a²

= 5/3ab or - 1/3ab .

So, these are its roots .

Step-by-step explanation:

Answer:

10+c=3

Step-by-step explanation:

to solve this you would then subtract 10 from both sides, to get c by itself.

3-10= -7

Your answer would be -7 and the equation would be 10+c=3.

Answer:

The country's capital is the region most affected by the pandemic. So far it has registered 308,645 positive cases. In recent weeks there has been an increase in cases, however, the Intensive Care Units continue to be controlled. Bogotá has been experiencing economic reactivation for several weeks, but they do not rule out some drastic measures in the future

Step-by-step explanation:

D. 17 years olddddddddddd

Answer:

Step-by-step explanation:

Start

Translate up

Rotate counter clockwise

Translate diagonally down

Rotate clockwise

Translate left

Answer:

12

Step-by-step explanation:

9/24 = 0.375 (how many peeled per minute)

0.375 x 32 = 12

Answer:

12 oranges

Step-by-step explanation:

Step 1:

9/24 = x/32        Equation

Step 2:

24x = 288        Multiply

Step 3:

x = 288 ÷ 24        Divide

Answer:

x = 12

Hope This Helps :)

Add the information given.

She is 15 feet away:

15 + ? = ?

The pole is 30 feet, and it is asking distance to the top.

15 + 30 = ?

15 + 30 = 45

Answer:

about 33.5 ft

Step-by-step explanation:

The distance from Mai-Lin’s feet to the top of the

flagpole is about 33.5 ft.

Parallel means their slopes should equal to each other.

Thus we need to find the slope of the given line ,

Let's do it.....

[tex]3x - 4y = 6[/tex]

Subtract sides -3x

[tex] - 3x + 3x - 4y = - 3x + 6[/tex]

[tex] - 4y = - 3x + 6[/tex]

Divided sides by -4

[tex] \frac{ - 4}{ - 4}y = \frac{ - 3}{ - 4}x + \frac{6}{ - 4} \\ [/tex]

[tex]y = \frac{3}{4}x - \frac{3}{2} \\ [/tex]

This is the slope-intercept of the line.

We know that the coefficient of the x in slope-intercept form , is the slope of the line.

Thus the slope of the equation which we want is :

[tex]slope = \frac{3}{4} \\ [/tex]

_________________________________

We have following equation to find the point-slope form of the linear functions.

[tex]y - y(given \: point) = slope \times (x - x(g \: p) \: ) \\ [/tex]

Now just need to put the slope and the given point in the above equation.

[tex]y - 6 = \frac{3}{4} \times (x - 4) \\ [/tex]

Multiply sides by 4

[tex]4(y - 6) = 3(x - 4)[/tex]

[tex]4y - 24 = 3x - 12[/tex]

Plus sides 24

[tex]4y - 24 + 24 = 3x - 12 + 24[/tex]

[tex]4y = 3x + 12[/tex]

Subtract sides -3x

[tex]4y - 3x = 3x - 3x + 12[/tex]

[tex]4y - 3x = 12[/tex]

And we're done....♥️♥️♥️♥️♥️

Answer:

903

Step-by-step explanation:

Answer:

129 x 6=774

774+1=775

Step-by-step explanation:

Hope this helps

Answer:

i do not know

Step-by-step explanation:

Answer:

[tex]8\frac{1}{2}*11=93\frac{1}{2}[/tex]

Step-by-step explanation:

Simplify the expression.

Answer:

this is not a good angle cant see it that well

Step-by-step explanation:

Answer:

the mistake is that the person added 2x by-4x which should've been -2x

Step-by-step explanation:

-4x+2x is basically saying 2-4 which is -2

Answer:

there is 16 female teachers because 4 * 4 is 14

male is eqaul to 12

so therefore female is eqaul to 3/4*12=9

Answer:

-2

Step-by-step explanation:

Pick a point the count down 2 and right 1 to the next point

Since it goes down and to the right its negative

Answer:

-2

Step-by-step explanation:

Rise over run. It went down which means it's a negative. Then it went right (run).

Answer:

3n + 5 =60

Step-by-step explanation:

Answer : n=55/3

Answer:

13-+4

Step-by-step explanation: