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dolphi86 [110]
2 years ago
12

A dentist wants to find out how often her patients floss their teeth. Which samples are biased? Check all that apply.

Mathematics
2 answers:
BaLLatris [955]2 years ago
6 0

Answer:

235

Step-by-step explanation:

professor190 [17]2 years ago
5 0

Answer:

Answers 2,3, and 4 are all biased.

Step-by-step explanation:

She has to check ALL her patients to be unbiased. Otherwise she is showing favoritism and bias.

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Y +
Usimov [2.4K]

Question:

What is the common denominator of $y+\frac{y-3}{3}$ in the complex fraction $\frac{y+\frac{y-3}{3}}{\frac{5}{y}+\frac{2}{3 y}}$

A) $3 y(y-3)$

B) $y(y-3)$

C) 3y

D) 3

Answer:

Option D : 3 is the common denominator

Explanation:

It is given that the complex fraction $\frac{y+\frac{y-3}{3}}{\frac{5}{y}+\frac{2}{3 y}}$

We need to determine the common denominator of $y+\frac{y-3}{3}$ from the complex fraction.

Let us consider the fraction $y+\frac{y-3}{3}$

To find the common denominator, let us take LCM.

Thus, rewriting the above fraction as,

\frac{y}{1} +\frac{y-3}{3}$

The LCM can be determined by multiplying the denominators.

Thus, we get,

1\times3=3

Thus, the common denominator is 3.

Hence, Option D is the correct answer.

6 0
3 years ago
Use the confidence level and Sample data to find the margin of error E. Round your answer to the same number of decimal places a
Ivenika [448]

Answer:

A) 2.6 mm Hg

Step-by-step explanation:

Margin of error = critical value × standard error

ME = CV × SE

n > 30, so we can approximate CV with a normal distribution.  At P = 94%, CV = 1.88.

SE = σ / √n

SE = 13.5 / √92

SE = 1.41

So the margin of error is:

ME = 1.88 × 1.41

ME = 2.6

8 0
2 years ago
The number of wolves in a wildlife preserve is estimated to have increased continually by 3% per year. If the population is now
34kurt
For the answer to the question above, <span>Well, first let us put up a functional equation. </span>
<span>Since this is an exponential function, it'll be: f(t)=54,000*1.03^t </span>
<span>But we want to know how many wolves there were 10 years ago. </span>
<span>For that, we simply "turn time around", as in: f(t)=54,00*1.03^-t </span>
<span>This displays a decreasing number of wolves, as you turn back time. </span>

<span>Now we simply calculate 54,000*1.03^-10 </span>
<span>which is approximately 40,200?</span>
5 0
3 years ago
I need the answers for these please
baherus [9]
1.11 2.14 3.10 4.9 5.-5 6.-8 7.11 8.40 9.9 10.12 11.30 12.22 13.3 14.-4 15.16 16.35
4 0
2 years ago
Can someone plz help me doing this :D
Mars2501 [29]
Ok so the first thing you would do is input the number where The variables are in the equation so 8^2-5(4)/4
6 0
3 years ago
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