1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
almond37 [142]
2 years ago
9

Suppose you want to study the relationship between smoking and cancer. You assume that smoking is a cause of cancer. Studies hav

e shown that there are many factors affecting this relationship, such as the number of cigarettes or the amount of tobacco smoked every day; the duration of smoking; the age of the smoker; dietary habits; and the amount of exercise undertaken by the individual. All of these factors may affect the extent to which smoking might cause cancer. These variables may either increase or decrease the magnitude of the relationship. Which statement is false?
a. In the above example cancer is the dependent variable.
b. In the above example cancer is an independent variable.
c. In the above example the extent of smoking is an independent variable.
d. In the above example all the variables that might affect the relationship between smoking and cancer, either positively or negatively, are extraneous or mediating/moderating variables.
Mathematics
1 answer:
finlep [7]2 years ago
6 0

Answer:

The correct answer is:

In the above example cancer is an independent variable. (b)

Step-by-step explanation:

In order to explain the choice made, let m first explain what independent and  dependent variables are:

Independent variable: An independent variable is a variable that is under the direct control of the experimenter, and can be changed at will. In this example, the number of cigarettes or amount of tobacco smoked is the independent variable because it can be manipulated at will, to determine the outcome of the dependent variable.

Dependent variable: A dependent variable is a variable that the experimenter sets out to study. The independent variable is not under the direct manipulation of the experimenter but has values that come about as a result of the change of the independent variable. In this example, cancer is the dependent variable, because it is the result of the manipulation of the amount of tobacco.

Therefore, it is not true to say that cancer is the independent variable as seen in option b

You might be interested in
A committee of 15 members is voting on a proposal. Each member casts a yea or nay vote. On a random voting basis, what is the pr
Igoryamba

Answer:

0.006% probability that the final vote count is unanimous.

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they vote yes, or they vote no. The probability of a person voting yes or no is independent of any other person. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

Random voting:

So 50% of voting yes, 50% no, so p = 0.5

15 members:

This means that n = 15

What is the probability that the final vote count is unanimous?

Either all vote no(P(X = 0)) or all vote yes(P(X = 15)). So

p = P(X = 0) + P(X = 15)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{15,0}.(0.5)^{0}.(0.5)^{15} = 0.00003

P(X = 15) = C_{15,15}.(0.5)^{15}.(0.5)^{0} = 0.00003

So

p = P(X = 0) + P(X = 15) = 0.00003 + 0.00003 = 0.00006

0.006% probability that the final vote count is unanimous.

7 0
2 years ago
If 4x - 8 = 4 , find the value of x​
Wittaler [7]

Answer:

x=3

Step-by-step explanation:

4x-8=4

4x=12

4x/4=12/4

x=3

3 0
3 years ago
Read 2 more answers
Find the area.<br> 7 in.<br> 5 in.<br> 12 in.
vitfil [10]

Answer and Step-by-step explanation:

<u>The area formula for a trapezoid is as follows:</u>

A = \frac{a + b}{2}h

Where:

A = Area

a = top side length

b = bottom side length

h = height

<u>Plug in the values given to you into the equation and solve.</u>

A = \frac{7 +12}{2}(5)

A = \frac{19}{2}(5)

A = \frac{95}{2}

<u>A = 47.5 </u>in.^2<u> is the answer.</u>

<u></u>

<em><u>#TeamTrees #PAW (Plant And Water) #ALM (All Lives Matter)</u></em>

6 0
3 years ago
Which interval is represented by the graph
kakasveta [241]

Answer:

you are correct the answer is c

4 0
3 years ago
Find the 12th term of the sequence:<br>8, 14, 20, 26, ...​
Zigmanuir [339]

Answer: 74

Step-by-step explanation:

nth term= 6n+2 (work out the nth term)

6x12+2=74 (substitute 12 in (to find the 12th term))

12th term= 74

3 0
3 years ago
Other questions:
  • Multiply out the brackets and simplify x(x3+2)
    11·1 answer
  • What is simplified value of the exponential expression 16^1/4
    12·2 answers
  • Which statement best describes the effect of replacing the function f(x) = 2x + 2 with the function g(x) = 2x - 3?
    11·2 answers
  • Idk how to explain it so here is a pic
    11·2 answers
  • WILL GIVE BRAINLIEST FOR CORRECT ANSWER
    15·2 answers
  • If ΔABC ΔDEC, what is m∠D? A. 40° B. 150° C. 60° D. 80°
    15·1 answer
  • What causes an electric charge to jump from your hand to a metal object?
    15·1 answer
  • A radio station had 60 tickets to a concert. They gave away 2 times as many tickets to listeners as to employees. How many ticke
    13·1 answer
  • If x and ​(13x​+34) are the measures of complementary​ angles, what is the measure of each​ angle?
    8·1 answer
  • -2x-9y=25 4x+9y=23 solve with elimination
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!