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Scrat [10]
3 years ago
5

A Fifty dog owners and 50 people who do not own dogs are each given a test to evaluate their stress levels. Dog owners are found

to have significantly lower stress levels than people who do not own dogs. Which of the following statements are true?
1. This study provides good evidence that owning a dog is effective in reducing stress.
2. It is likely that a confounding variable could be a contributing explanation for the difference between these two groups.
3. This is an observational study, not an experiment.
a. I only
b. II only
c. III only
d. II and III only
e. I and III only
Mathematics
1 answer:
kiruha [24]3 years ago
3 0

Answer: 2. It is likely that a confounding variable could be a contributing explanation for the difference between these two groups.

3. This is an observational study, not an experiment.

Step-by-step explanation:

Based on the information given, the statement that's true include:

• It is likely that a confounding variable could be a contributing explanation for the difference between these two groups.

• This is an observational study, not an experiment.

It is an observational study as the researcher observed just observed the scenarios without him trying to change the people that are being exposed to it or controlling it.

Therefore, the correct options are II and III only.

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14) Find the slope of the line containing the points (5, 3) and (-7, 2).
Zina [86]

Answer:

1/12

Step-by-step explanation:

Step one:

given data

the line containing the points (5, 3) and (-7, 2).

x1= 5

y1= 3

x2= -7

y2=2

Step two:

The slope is given as

Slope= y2-y1/x2-x1

substitute

Slope= 2-3/-7-5

Slope= -1/-12

Slope = 1/12

7 0
3 years ago
6. Brandom can swim 15 laps around the pool in 40 minute. Peter can swim 10 laps in 25 minutes.
wel

Answer:

A. Brandon can swim 0.375 laps every minute and Peter can swim 0.4 laps a minute.

B. Brandon 0.375 laps a minute Peter 0.4 laps a minute

C. Peter will swim 20 laps first I know because the rate at which he swims is faster than Brandon's

3 0
3 years ago
How do i answer this?<br>3(m-2)=2(3m+3)
krek1111 [17]
3 (m - 2) = 2 (3m + 3)   Use the Distributive Property on both sides
   3m - 6 = 6m + 6        Subtract 6m from both sides
  -3m - 6 = 6                 Add 6 to both sides
        -3m = 12               Divide both sides by -3
           m = -4
8 0
3 years ago
Suppose you take out a loan for $9,000, at 12% ordinary interest. If the amount of interest is $762.00, what is the time period?
DaniilM [7]
For the answer to the question above,
<span>Let's figure out the formula first
FV = PV(1+i/n)^(nt)
9762= 9000(1+0.12/12)^(12x)
9762= 9000(1.01)^12x
9762/9000=1.01^12x
1.08467=1.01^12x
ln1.08467/12 x ln1.01=0.681 years (8.17 months) same as my calculator
So,
0.681x360=
245.16 days is</span><span> the time period</span>
3 0
3 years ago
What is the excluded value of x / x^2 +2x -3​
Rzqust [24]

Answer:

x = - 3 and x = 1

Step-by-step explanation:

Given the rational expression

\frac{x}{x^2+2x-3}

The denominator of the expression cannot be zero as this would make the expression undefined. Equating the denominator to zero and solving gives the values that x cannot be, that is

x² + 2x - 3 = 0 ← in standard form

(x + 3)(x - 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

x - 1 = 0 ⇒ x = 1

Thus x = 1 and x = - 3 are both excluded values

3 0
3 years ago
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