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omeli [17]
3 years ago
13

true or false: a well-designed sample survey, the sample percentage is very likely to equal the population percentage. explain.

Mathematics
1 answer:
Andru [333]3 years ago
8 0

Answer:

false

Step-by-step explanation:

There's going to be some variabilty between the sample and population percentages, cus the sample only contains part of of the population. Even if it is a well designed survey, it doesn't affect this, because no matter how good the sample is, there will always be variability between the two (unless the sample includes the whole population). I hope this helps :)

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Which fraction is greater than 1/3? 2/4, 2/8, 3/5, 3/10, 4/6​
anyanavicka [17]

Answer:

<h3>3/5</h3>

Step-by-step explanation:

<em>2/4 would be simplified to 1/2, 2/8 could be simplified to 1/4, 4/6 would also be simplified- 3/5 and 3/10 u must compare, and 3/5 is greater.</em>

7 0
3 years ago
Use the unit circle to evaluate the six trigonometric functions of θ = -π.
Cerrena [4.2K]

Answer:

sin=0

cos=-1

tan=0

csc=undefined

sec=-1

cot=undefined

Step-by-step explanation:

On the unit circle, -\pi=\pi. The sin of theta is therefore 0, the cosine is -1, and the tangent is 0/-1=0. Since the following functions are just the reciprocals of the previous ones, the cosecant is 1/0=undefined, the secant is 1/-1=-1, and the cotangent is 1/0= undefined. Hope this helps!

8 0
4 years ago
QUESTION: (whats the symbol of integers and whats the tabular form of integers) PLS TELL ME CORRECT ANSWER ​
Olin [163]

Answer:

Symbol of integer =Z

Roster or tabular form: In roster form, all the elements of a set are listed, the elements are being separated by commas and are enclosed within braces { }.

For Example:{3,0-1,}

5 0
3 years ago
a quantity of ethanol is cooled from 47.9° C to 12.3°C and releases 3.12 KJ of heat. what is the mass of the ethanol sample?​
victus00 [196]

Answer:

35.9 grams

Step-by-step explanation:

We use the formula:

q=m*C_p*\Delta T

Where

q is heat released

m is mass

C_p is the constant 2.44

ΔT is change in temperature

We put the info in the formula and solve for m (mass):

q=m*C_p*\Delta T\\-3.12 =  m*2.44(12.3-47.9)\\-3.12*10^3=m*(-86.864)\\m=35.9

The mass of ethanol is 35.9 grams

8 0
4 years ago
Roman civilization began in 509 BC and ended in 476 A.D Roman civilization last show working​
Monica [59]

Answer:

Roman civilization lasted for 985 years.

Step-by-step explanation:

Given that Roman civilization began in 509 BC and ended in 476 A.

All we have to do is to subtract -579 from 476.

i.e.

476 - (-509)

=476+509

=985 years

Thus, Roman civilization lasted for 985 years.

6 0
3 years ago
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