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
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.

You might be interested in
The coach uses a scale drawing of the soccer fieldin the diagram, to review plays with the team. The diagram uses a scale of 1/4
Otrada [13]

Answer:

10

Step-by-step explanation:

12

4 0
2 years ago
deanna's parents are going to buy her a ipod touch and headphones that cost a total of 201.60. her parents plan to make 9 equal
Pani-rosa [81]
$22.40 FOR EACH PAYMENT IF TAXES ARE ALREADY ADD.
4 0
3 years ago
Find the range of the function y=7x-1 when the domain is {-1, 0, 1}
mrs_skeptik [129]

Answer:

b

Step-by-step explanation:

6 0
2 years ago
Perform the indicated operation. 15b/4 * 8/9a^2b^2
Sergio [31]

Answer:

The simplified expression is \frac{10}{3 a^2 b}

Step-by-step explanation:

The given expression is:

\frac{15b}{4} * \frac{8}{9a^2 b^2}

Multiply the items in the numerator together ( 15b * 8 = 120 b). Also multiply the items in the denominator together ( 4 * 9a²b² = 36a²b²). The expression thus becomes:

= \frac{120b}{36 a^2 b^2} \\\\

Divide both the numerator and the denominator by 12b:

= \frac{120b /12b}{36 a^2 b^2/12b}

The expression finally becomes:

= \frac{10}{3 a^2 b}

7 0
3 years ago
.Margaret is treating her best friend to a birthday dinner. Before ordering, Margaret wants to have an idea of the final bill. T
Nikitich [7]

Answer:

Your answer is 61.

Step-by-step explanation:

Simple enough! We simply round up each cost to the nearest whole dollar. $6.50 can be rounded to $7, $15.75 can be rounded up to $16, $2.25 can be rounded up to $3 (Note we're rounding up, in normal rounding we would round down to $2). Finally, $7.25 can be rounded up to $8.

Next comes simple algebra,

7+(16*2)+(3*2)+(8*2)=61

Therfore, your overestimate of the cost would be 61.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following sets are closed under multiplication? Select all that apply. integers irrational numbers whole numbers po
    12·1 answer
  • Which of the following equations has a graph that crosses the y-axis at a point lower than y=2x^2-1
    12·1 answer
  • 14
    11·2 answers
  • Answer the question. Will give Brainliest to whoever gets it right.
    10·1 answer
  • What is the formula for perimeter of a square​
    11·2 answers
  • What is the area of this composite figure?
    13·1 answer
  • On the last math test in Kenzie’s class, 17 out of 25 students scored an 80 or higher. Which percent is closest to the experimen
    10·1 answer
  • What is the location of point G, which partitions the directed line segment from D to F into a 5:4 ratio? A number line goes fro
    10·2 answers
  • 10. Model with Math Graph the equation y= -5x on the coordinate plane. ​
    15·1 answer
  • Solve for x: -5bracket(-3x+1)=-45
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!