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dem82 [27]
3 years ago
13

An observational study found that the amount of sleep an employee gets each night is associated with job performance. The correl

ation coefficient was found to be r=0.86. A reader of the study concluded that more sleep causes employees to perform better. Why is such a conclusion not correct?
A)The correlation value should equal 1 for such a conclusion.
B)The correlation value should be negative for such a conclusion.
C)The sample was not representative of the population.
D) Causation cannot be determined from an observational study.
E) The correlation value implies that less than 75% of the variability in job performance can be explained by sleep.
Mathematics
1 answer:
blagie [28]3 years ago
6 0

Answer:

The correct option is D.) Causation cannot be determined from an observational study.

Step-by-step explanation:

The conclusion is not correct because

D.) Causation cannot be determined from an observational study.

Causation determined from an observational study is speculative and cannot be confirmed without data from a real experiment.

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Use the table to find the residual points. A 4-column table with 5 rows. The first column is labeled x with entries 1, 2, 3, 4,
Readme [11.4K]

Answer:

What is the change for each consecutive input?

✔ 1

What is the change for each consecutive output?

✔ 0.35

What is the rate of change for the relationship?

✔ 0.35

Step-by-step explanation:

The change for each input is 1 beacause the inputs are 10,11,12,13

The change for each consecutive output is 0.35 beacuse we need to subtract 4.1 from 3.75

The rate of change for the relationship is also 0.35

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4 years ago
Plsss helo me with this 20 points!
Natasha2012 [34]

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2 years ago
You and your friend went shopping. You bought 2 hats and 3 pairs of gloves for $28.25. Your friend bought 1 hat and 1 pair of gl
vodomira [7]

Answer:

One pair of gloves costs $3.75.

Step-by-step explanation:

Systems of equations

x=hats y=gloves

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24.5+y=28.25

y=3.75

8 0
3 years ago
4.05 LC)
Goshia [24]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
Explain why the sum of two rational numbers is always rational. To earn full credit, you must provide an expression or example A
scoundrel [369]
So, adding two rationals is the same as adding two such fractions, which will result in another fraction of this same form since integers are closed under addition and multiplication. Thus, adding two rational numbers produces another rational number.


a/b and c/d are rational numbers with a,b,c,d intergers

so with the same denominators ( equaling a+c over b) or different ones (equaling ab+cb over bd) they end up with the answers of

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this may not make sense but i'm pretty sure i understood you right
3 0
3 years ago
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